Malaria Treatment

What Is Malaria?

Malaria is an infection of the blood caused by Plasmodium parasites, which pass to humans through the bite of an infected female Anopheles mosquito. Once inside the body, the parasites develop first in the liver and then invade red blood cells, where they multiply and set off the repeating cycles of fever, chills and sweating that define the illness. Malaria mainly affects people who live in or travel to endemic regions — large parts of sub-Saharan Africa, South Asia, Southeast Asia, Latin America, the Middle East and Oceania. For a returning traveller, an expatriate, a student or a business visitor, it is one of the most important causes of fever to identify without delay.

Malaria is treatable. It is also, in some forms, capable of becoming dangerous quickly — particularly when caused by Plasmodium falciparum, the species most often linked with severe disease. That is the central fact about malaria: what begins as a flu-like illness can become a medical emergency within days, yet the same illness usually responds well when the correct antimalarial medicine is started early. Neither half of that sentence should be forgotten. Malaria is not an illness to watch passively at home, and it is not an illness where fear needs to replace information. This page explains how the infection works, how to recognise malaria symptoms, how the diagnosis is confirmed and what treatment involves — from uncomplicated cases managed with tablets to severe disease treated in a monitored hospital unit.

What causes malaria?

Plasmodium parasites cause malaria; nothing else does. Five species regularly infect humans, and the species matters because each behaves differently in the body and responds differently to treatment:

• Plasmodium falciparum — the species most often responsible for severe malaria. It can multiply rapidly, and infected red blood cells can stick inside small blood vessels, contributing to complications affecting the brain, kidneys and lungs.
• Plasmodium vivax — widespread outside Africa. It can form dormant liver stages called hypnozoites, which may reactivate weeks or months later and cause a relapse even after the original episode was treated.
• Plasmodium ovale — less common, but it shares the ability to form dormant liver stages and cause relapses.
• Plasmodium malariae — typically causes a milder but more indolent infection, which can persist at low levels for a long time if untreated.
• Plasmodium knowlesi — found mainly in parts of Southeast Asia. It can multiply quickly and needs careful clinical attention.

Identifying the species is not academic detail. It determines which medicine is used, whether relapse-prevention therapy is needed and how closely the patient should be monitored. It is one of the first questions the laboratory works to answer.

How is malaria transmitted?

Malaria is transmitted through the bite of an infected female Anopheles mosquito, which typically feeds between dusk and dawn. When the mosquito bites, it injects parasites into the bloodstream. Much less commonly, malaria can be passed through blood transfusion, organ transplantation or the sharing of needles, because the parasite lives in blood. A pregnant woman with malaria can also pass the infection to her baby before or during delivery — this is known as congenital malaria. Outside these blood-based routes, the parasite has no way of moving from one person to another.

How do you get malaria?

In practice, you get malaria by being bitten by an infected mosquito in a region where the parasite circulates. The risk is shaped by geography, season, accommodation and behaviour: rural areas often carry higher risk than city centres, transmission may rise during and after rainy seasons, and time spent outdoors at night without protection increases exposure. Preventive antimalarial medication, insect repellent, treated bed nets and covering clothing all reduce risk, but none removes it entirely — which is why fever after travel to an endemic region always deserves testing, even in a traveller who took prophylaxis carefully. You cannot get malaria from food, water, air or ordinary contact with another person.

Is malaria contagious?

No. Malaria is not contagious in the everyday sense of the word. A person with malaria cannot pass the infection to family members, colleagues or fellow travellers through touch, coughing, sneezing, kissing or shared meals. The parasite needs either a mosquito to carry it between people or direct blood-to-blood contact. This matters practically: relatives caring for someone with malaria are not at risk from the patient, and there is no need for the isolation measures used for contagious infections. The one caveat is that in areas where Anopheles mosquitoes are present, an infected person can be a source from which mosquitoes pick up the parasite and pass it onward.

How can malaria be prevented?

Prevention rests on two pillars: avoiding mosquito bites and, for travellers to higher-risk regions, taking preventive antimalarial medication prescribed before departure. Bite avoidance means sleeping under insecticide-treated bed nets, using effective insect repellent on exposed skin, wearing long sleeves and trousers in the evening, and choosing screened or air-conditioned accommodation where possible — measures that matter most between dusk and dawn, when Anopheles mosquitoes feed. Preventive medication is chosen according to the destination’s resistance patterns, the length of stay and the traveller’s health, and it works only when taken on schedule for the full recommended period, including the days or weeks after leaving the endemic area. No preventive strategy is absolute, which is why fever after travel still calls for testing even when every precaution was followed. Pregnant travellers and families with young children need particularly careful pre-travel planning, since both groups face higher risk from the infection itself.

What happens if you get malaria?

After an infected bite, the parasites travel to the liver, where they multiply silently — the person feels well during this incubation period, which usually lasts days to weeks but can, with some species, stretch to months. The parasites then leave the liver and invade red blood cells. Inside each cell they multiply until the cell ruptures, releasing a new wave of parasites and triggering fever, chills and inflammation. Some patients notice a repeating rhythm of fever spikes; others have persistent or irregular fever with no clear pattern. If the infection is treated correctly at this stage, the blood is cleared and the illness resolves. If it is not treated — especially with P. falciparum — parasite levels can climb, red blood cell destruction can cause anaemia, and organ complications can develop. With P. vivax and P. ovale, dormant liver forms can persist even after the blood-stage illness ends, seeding relapses later unless they are treated specifically.

Malaria Symptoms

Malaria symptoms usually begin with fever, shaking chills, drenching sweats, headache, muscle aches and profound fatigue. Many patients also have nausea, vomiting, diarrhoea, back pain or abdominal discomfort, and some simply describe a general sense that something is not right. None of these is unique to malaria, which is exactly the problem: the illness can imitate influenza, gastroenteritis and other travel-related infections in its early days. The interval between infection with malaria and symptoms appearing varies by species — often within a few weeks of exposure, but sometimes months later, particularly with P. vivax, P. ovale and P. malariae. This is why past travel is worth mentioning to a clinician even when a trip does not seem recent enough to be connected.

The symptoms of malaria parasite infection appear when parasites rupture red blood cells and the immune system responds to the released material. Each wave of rupture can produce a fever spike, followed by chills and sweating as the temperature falls. As the infection continues, destruction of red blood cells can cause anaemia — felt as weakness, breathlessness on exertion and pallor — while inflammation contributes to headache, body aches and exhaustion that often outlasts the fever itself.

What are the first symptoms of malaria?

The first symptoms of malaria are usually fever and chills, often accompanied by headache, tiredness and aching muscles. In the earliest days they are typically indistinguishable from a common viral illness, which is why exposure history — not symptom pattern — is what should prompt testing. Children may present less typically, with irritability, poor feeding, vomiting or drowsiness rather than a clearly reported fever pattern. Because early malaria looks so ordinary, the diagnosis rests on a simple rule that clinicians apply consistently: fever after time in a malaria-endemic region is malaria until a blood test shows otherwise.

Certain features mark the transition from uncomplicated illness to severe disease, and clinicians treat them as signs that hospital-level care is needed. These include confusion, drowsiness or seizures; difficulty breathing; jaundice — yellowing of the eyes or skin — alongside other organ problems; persistent vomiting that prevents fluids or medicines staying down; markedly reduced urination; abnormal bleeding; and collapse or severe weakness. Severe malaria is most commonly caused by P. falciparum, although other species can also cause significant illness in some patients.

Who May Need Malaria Testing and Treatment

Anyone who develops fever or flu-like symptoms after time in a malaria-endemic area may need testing and, if the infection is confirmed, treatment. Malaria can appear within days or weeks of exposure, but some species cause symptoms months after the trip has ended. Delayed presentation catches people out: the connection between a holiday taken last season and a fever today is easy to miss, and partially treated or misattributed malaria can smoulder and return.

Some groups carry a higher risk of severe illness and are assessed with particular care. These include children, older adults, pregnant patients, people with weakened immune systems, people with chronic medical conditions, and travellers from non-endemic countries who have no partial immunity from previous exposure. Residents of endemic regions who have moved abroad can also lose their partial immunity over time, which means a visit home after years away carries real risk even for someone who grew up with malaria around them.

In clinical practice, doctors treat the following situations as reasons for urgent malaria evaluation:

• Fever after travel to sub-Saharan Africa, South Asia, Southeast Asia, Latin America, the Middle East or another malaria-endemic region
• Chills, sweats or flu-like symptoms following mosquito exposure during travel
• Confusion, drowsiness, seizure, fainting or severe weakness in someone with possible exposure
• Shortness of breath, persistent vomiting, jaundice or reduced urination alongside fever
• Pregnancy with possible malaria exposure
• A previous malaria diagnosis with recurring fever — especially after P. vivax or P. ovale infection, where relapse from dormant liver stages is possible

Evaluation may also be appropriate for patients who took preventive medication and became ill anyway. Prophylactic drugs reduce risk substantially in principle, but adherence gaps, vomiting after doses and regional drug resistance mean breakthrough infection remains possible. In these cases, the specific prophylactic taken becomes part of the treatment decision, because the same drug class is generally not used again to treat the infection it failed to prevent.

How Malaria Is Diagnosed

Diagnosis begins with a detailed history. Clinicians ask where the patient travelled or lived, the dates of travel, mosquito exposure, use of preventive medication, previous malaria episodes, pregnancy status, allergies and any medicines already taken. This is not routine form-filling. Antimalarial drug resistance varies by region, and a traveller who crossed several countries may have been exposed in a place with different parasite species and resistance patterns than the itinerary first suggests. Medication brought from abroad, treatment started and abandoned, or tablets whose names are half-remembered should all be mentioned openly — packaging or a photograph of the medicine box is genuinely useful.

Blood testing then does the decisive work. Thick and thin blood smears, examined under a microscope by laboratory specialists, remain the reference method: the thick smear concentrates blood to detect parasites even at low levels, while the thin smear allows the species to be identified and the parasitaemia — the proportion of red blood cells infected — to be estimated. Parasitaemia matters because it is one of the markers separating uncomplicated malaria from severe disease. Rapid diagnostic tests, which detect malaria antigens from a drop of blood, can support an early decision while microscopy is being completed. In selected cases, molecular (PCR) testing helps confirm the diagnosis or clarify the species when standard methods leave doubt. A single negative test does not always end the question: parasite levels fluctuate, and repeat smears may be needed when suspicion remains high.

Alongside parasite detection, broader blood tests show how the infection is affecting the body. A complete blood count may reveal anaemia or low platelets — both common in malaria. Chemistry panels assess kidney and liver function. Blood glucose is checked because malaria, and some of its treatments, can be associated with low blood sugar, particularly in severe illness and pregnancy. In patients with possible severe malaria, coagulation studies, blood gas analysis and lactate levels help gauge how much strain the body is under. And because a returning traveller can carry more than one possibility, clinicians may test in parallel for dengue fever, typhoid fever, viral hepatitis or other travel-related infections when the picture suggests them. Imaging may be used when symptoms point to a complication or an alternative diagnosis, but malaria itself is confirmed through blood-based testing, not scans.

What Malaria Treatment Involves

Malaria treatment is the use of specific antimalarial medicines, together with supportive medical care when needed, to clear Plasmodium parasites from the bloodstream and prevent complications, relapse and onward transmission. There is no single standard prescription. The regimen is chosen according to the parasite species, the region where infection was acquired and its known resistance patterns, the severity of illness, and the patient’s age, pregnancy status, other medicines and underlying health.

For uncomplicated P. falciparum malaria, artemisinin-based combination therapies are widely used because they act quickly and pair drugs with different mechanisms, which slows the emergence of resistance. Chloroquine may be appropriate for infections acquired in the limited regions where the parasite remains sensitive to it. Atovaquone-proguanil, quinine-based regimens and other alternatives are considered depending on availability, resistance data, contraindications and what the patient has already taken — including any prophylactic drug, which is generally not reused as treatment.

For P. vivax and P. ovale, treatment has two distinct parts. The first clears parasites from the blood and ends the current episode. The second targets the dormant liver stages — the hypnozoites — to prevent relapse. Medicines used for this second step, such as primaquine or tafenoquine, can trigger haemolysis, a breakdown of red blood cells, in people with glucose-6-phosphate dehydrogenase (G6PD) deficiency, an inherited enzyme condition. G6PD testing therefore comes before any relapse-prevention prescription, and pregnancy and breastfeeding also shape whether and when this step can be given.

Severe malaria is a different category altogether. It is treated urgently in hospital with intravenous antimalarial therapy — most commonly an artesunate-based approach where available and appropriate — followed by a full oral course once the patient is stable and able to take tablets. Alongside the antimalarial itself, treatment addresses the complications: intravenous fluids given carefully, oxygen support, glucose management, transfusion for severe anaemia, kidney support, seizure treatment and continuous monitoring in an intensive care setting when needed. The goal is not only to clear the parasite but to protect the brain, kidneys, lungs and circulation while the body recovers.

Is malaria curable now?

Malaria can be treated effectively, and correctly chosen therapy can clear the parasite from the body completely. What treatment cannot do is create immunity: a person who has recovered can be infected again on a future exposure, and P. vivax or P. ovale infections can relapse from dormant liver stages if that part of treatment is missed. So the honest answer is that a given malaria infection is very much treatable — provided the species is identified, the right regimen is chosen for the region of exposure, and relapse-prevention therapy is completed where it applies.

Can a person survive malaria?

Yes. The great majority of malaria episodes that are diagnosed promptly and treated correctly resolve, and even severe malaria is survivable with intensive hospital care. The determining factors are speed and accuracy: how quickly the infection is recognised, how early effective medicine is started, and how well complications are managed. The dangerous scenarios are the ones where treatment is delayed — because the fever was assumed to be flu, because a partial course masked the illness, or because travel history was never asked about. Untreated falciparum malaria can be fatal, which is precisely why the threshold for testing a fever after travel is deliberately low.

How Malaria Treatment Is Performed, Step by Step

Initial assessment and triage

The first clinical task is deciding whether the patient is stable or needs urgent hospital care. Vital signs are checked — temperature, blood pressure, heart rate, oxygen saturation and mental status — and the clinician looks for warning features: confusion, severe dehydration, laboured breathing, jaundice, inability to keep oral medicine down, pregnancy, very young or advanced age, and chronic conditions that raise risk. For international patients, the travel route is reviewed in detail, because exposure geography drives drug choice. From there, a typical treatment pathway follows a recognisable sequence:

• 1. Confirm and characterise. Blood smears and rapid tests establish the diagnosis, identify the species and estimate parasitaemia, while broader blood tests assess organ function.
• 2. Grade the severity. The findings sort the illness into uncomplicated malaria, manageable with oral medicine and follow-up, or severe malaria, requiring intravenous therapy and monitored care.
• 3. Select the regimen. The species, region of acquisition, resistance patterns, pregnancy status, prior medications and G6PD status (where relevant) shape the exact prescription.
• 4. Treat and monitor. Response is tracked clinically and, where indicated, with repeat smears and laboratory tests until the parasite is cleared and organ function is stable.
• 5. Plan the follow-up. This includes relapse-prevention therapy for P. vivax or P. ovale where appropriate, review of anaemia, and advice on future prevention.

During treatment

Many patients with uncomplicated malaria take oral medication and recover without intensive care, but the days on treatment still need attention. Nausea and vomiting can interfere with drug absorption; vomiting shortly after a dose matters clinically, because the medicine may not have been taken up, and the treating team factors this in — sometimes repeating a dose, sometimes switching to hospital-based therapy. Fever often improves within the first several days of effective treatment, while fatigue commonly lingers as the body recovers from inflammation and anaemia. Antimalarial courses are designed to be completed in full: stopping when symptoms fade can leave parasites in the blood and set up a recurrence, which is why the treating doctor’s instructions on dose and duration carry real weight.

In hospitalised patients, care teams monitor temperature, blood pressure, fluid balance, urine output, oxygenation and mental status, with repeat blood smears and laboratory tests used to confirm that parasite levels are falling and organs are recovering. Possible side effects and drug interactions are reviewed as treatment proceeds. For patients who intend to travel onward after treatment, clinicians generally advise waiting until fever has resolved, the clinical picture is stable and the follow-up plan — including any relapse-prevention step — is clear.

Technology used in modern malaria care

Malaria care depends on timely diagnostics and close monitoring rather than any single device. Microscopy remains foundational because it identifies the parasite, names the species and quantifies the burden. Rapid diagnostic platforms shorten the time to a first answer. Molecular testing resolves ambiguous cases. Hospital laboratories deliver fast turnaround on blood counts, kidney and liver function, electrolytes and glucose — the numbers that separate an uncomplicated case from a developing emergency. When severe malaria is suspected, monitored units provide continuous or frequent assessment of vital signs, oxygen levels, urine output and neurological status. The value of all this technology is practical rather than impressive-sounding: faster diagnosis, sharper risk assessment, safer medication selection and earlier recognition of complications.

Conditions and Indications Malaria Treatment Addresses

Treatment is indicated when malaria is confirmed, or strongly suspected on the basis of symptoms and exposure. Because delay is dangerous, physicians may begin therapy while diagnostic confirmation is still in progress if suspicion is high or the patient appears seriously ill. Within that broad indication, several distinct situations shape the plan.

Uncomplicated malaria — symptoms without evidence of organ dysfunction — is usually treated with oral antimalarial medication chosen for the species and region of acquisition. Even the uncomplicated form needs proper follow-up, because symptoms can improve before the infection is fully cleared.

Severe malaria requires urgent hospital-based treatment. It may involve high parasite levels, impaired consciousness, seizures, severe anaemia, low blood sugar, acidosis, kidney impairment, lung involvement, abnormal bleeding, jaundice with organ dysfunction or shock. It is most commonly caused by P. falciparum, though other species can produce significant disease in some patients.

Relapsing malaria from P. vivax or P. ovale needs the two-part approach described above: blood-stage treatment for the current episode, and liver-stage therapy — after G6PD testing and consideration of pregnancy and breastfeeding — to prevent the dormant hypnozoites from reactivating.

Malaria in pregnancy is managed with medication selected to protect both the pregnant patient and the fetus. Untreated, malaria in pregnancy can cause severe maternal illness, anaemia, miscarriage, premature delivery and low birth weight, so the choice of drug balances trimester, severity and species against the safety profile of each option.

Breakthrough infection despite prophylaxis is its own scenario. Preventive drugs reduce risk but do not eliminate it, and when a patient falls ill despite prophylaxis, the treating physician weighs which drug was used, how consistently it was taken, whether doses were vomited, and whether regional resistance explains the failure — all before choosing a treatment regimen that avoids the same vulnerability.

Why Acting Early Matters

Malaria can move from a treatable febrile illness to a medical emergency, sometimes within a short period. Early diagnosis lets physicians start the correct medicine before parasite levels climb and before inflammation reaches vital organs. This is particularly true for P. falciparum, where infected red blood cells can obstruct small blood vessels and contribute to cerebral malaria, kidney injury, respiratory distress and shock.

Delay also muddies the diagnosis. A patient who takes partial treatment, a course of antibiotics or repeated fever-reducing medication may feel temporarily better without the infection being cleared — a pattern that leads to recurrence or a more advanced presentation later. With P. vivax or P. ovale, overlooking the relapse-prevention step allows repeated episodes that disrupt work and travel and steadily worsen anaemia.

For pregnant patients, infants, older adults and people with chronic illness, the case for early assessment is strongest of all. Malaria compounds anaemia, dehydration and metabolic stress, and each of these groups tolerates that combination poorly. Prompt treatment narrows the window in which complications can develop and gives specialists room to choose medicines that fit the individual’s health profile rather than being forced into emergency decisions.

Benefits of Malaria Treatment

Appropriate malaria treatment can rapidly reduce the parasite burden, relieve symptoms and lower the risk of serious complications. The table below summarises what each element of a well-run treatment plan actually delivers.

Benefit	What It Means for You
Targeted parasite clearance	The medication plan is selected to treat the likely or confirmed malaria species and the region where infection was acquired.
Reduced risk of severe disease	Early therapy helps prevent progression to complications involving the brain, kidneys, lungs, blood or circulation.
Symptom improvement	Fever, chills, headache and body aches often begin to improve after effective treatment, although fatigue may take longer to resolve.
Relapse prevention when needed	For P. vivax or P. ovale, additional evaluation and therapy may reduce the risk of future episodes from dormant liver forms.
Safer care for higher-risk patients	Pregnancy, childhood, older age and chronic medical conditions can be considered when selecting medications and monitoring.
Identification of complications	Laboratory testing and clinical monitoring help detect anaemia, kidney stress, low blood sugar or other issues that may need treatment.

Recovery Timeline After Malaria Treatment

Recovery varies with the parasite species, the severity of illness, the patient’s general health and — above all — how quickly treatment began. Many patients nonetheless follow a broadly similar pattern.

Time Period	What Patients Can Expect
Day 1	Diagnosis is confirmed or strongly suspected, antimalarial medication is started, and the care team assesses whether hospital monitoring is needed.
First 48 to 72 Hours	Fever and chills may begin to decrease. Patients are monitored for medication tolerance, hydration, blood sugar and signs of complications.
First Week	Many patients with uncomplicated malaria feel noticeably better, though fatigue, reduced appetite and weakness can persist. Completing the prescribed course remains essential.
First Month	Energy gradually returns. Follow-up may include repeat blood tests, review of anaemia and planning relapse-prevention therapy for certain species.
Longer Term	Patients treated for P. vivax or P. ovale may need ongoing attention to relapse risk. Travellers may receive advice on future prevention.

How long does malaria treatment take?

The medication course itself depends on the regimen: some oral courses last a few days, while relapse-prevention treatment for P. vivax or P. ovale follows a longer or specifically timed schedule. Hospital stays vary with severity, response to therapy, pregnancy status and any complications. Patients with uncomplicated malaria often improve quickly once the correct treatment starts; severe malaria can require several days or longer of close medical care, followed by a gradual convalescence at home built around hydration, nutrition, rest and any follow-up testing the treating team recommends. Clinicians also typically explain which changes matter after discharge — returning fever, worsening weakness, yellowing of the eyes or skin, confusion, breathlessness, persistent vomiting or reduced urination — so that a developing problem is recognised for what it is rather than dismissed as slow recovery.

What Influences Outcomes and a Good Result

Several factors shape how quickly and completely a person recovers from malaria. The first is the parasite species. P. falciparum is the most likely to cause severe illness and rewards speed above all else. P. vivax and P. ovale demand attention to relapse prevention, or the episode will not be the last. P. malariae and P. knowlesi have their own clinical patterns and need tailored management.

The second is how ill the patient is when treatment begins. Someone who reaches care before organ dysfunction develops generally has a simpler course. Severe anaemia, kidney injury, altered mental status, low blood sugar, pregnancy or a high parasite burden all make treatment more complex and may require intensive care support. It is worth noting that confusion in severe malaria has a physical cause — the parasite’s effect on blood flow and metabolism in the brain — and is a different phenomenon from psychological presentations such as dissociative symptoms, which have no infectious basis.

The third is medication selection. Antimalarial resistance varies by geography, and a regimen appropriate for one region may be unsuitable for another. This is why travel history is not a minor administrative detail: it is part of the prescription itself. The treating team also weighs previous prophylaxis, allergies, drug interactions, liver and kidney function, pregnancy and breastfeeding before committing to a regimen.

Adherence is the fourth. Courses are designed to be taken exactly as prescribed and completed in full; stopping early can allow parasites to persist and the illness to return. A dose vomited shortly after being taken may not have been absorbed, which is information the treating doctor needs. Alcohol, dehydration and self-medication can each complicate recovery, and they belong in the conversation with the clinician rather than left unmentioned.

The last factor is follow-up. A good result is not only a cleared blood smear on the day of discharge. It is confirmed G6PD status and a completed liver-stage plan where a relapsing species is involved; it is anaemia that has been tracked back to normal; and it is a patient who understands, before the next trip, how prevention works. For relapsing species in particular, the difference between one malaria episode and a string of them often comes down to whether this final phase of care was finished properly.

Malaria Care at Acibadem

At Acibadem, malaria is handled as an urgent diagnostic and treatment pathway rather than a routine outpatient question. Infectious disease physicians work alongside emergency medicine, internal medicine, paediatrics, obstetrics, intensive care, haematology, nephrology and laboratory medicine when a patient’s condition calls for broader expertise. That multidisciplinary structure matters most in exactly the situations where malaria is hardest: severe disease, infection in pregnancy, paediatric cases and patients in whom a second travel-related infection may be present at the same time.

The diagnostic pathway is built for speed and clarity. Blood smear microscopy, rapid antigen testing, comprehensive laboratory analysis and selected molecular methods support both the initial diagnosis and the treatment decisions that follow. For patients with warning signs, monitored units and intensive care capability allow close observation of neurological status, oxygenation, kidney function, blood pressure and metabolic balance — the aim being not simply to name the infection, but to understand what it is doing to the whole patient.

Treatment plans are individual. A patient returning from West Africa may need a different regimen from one exposed in South Asia or Latin America. A pregnant patient needs medicine chosen with fetal and maternal safety in view. A patient with possible P. vivax relapse needs G6PD testing before relapse-prevention medicines are considered. A traveller who has already taken partial therapy abroad needs that history reviewed carefully so that the next regimen is neither ineffective nor unsafe in combination. Cases are discussed across specialties when needed, so decisions reflect both established protocols and the specifics of the person being treated.