Co je Chloroquine?
Chloroquine is a synthetic antimalarial medicine belonging to the 4-aminoquinoline class. First developed in the 1930s and widely adopted following World War II, it is one of the oldest medicines used in travel health. While resistance has significantly reduced its global utility for malaria prevention, Chloroquine remains relevant for specific travel destinations and is still recommended by the World Health Organization (WHO) in regions where malaria parasites retain sensitivity to the drug.
Chloroquine is also used in clinical medicine to manage certain autoimmune conditions, including rheumatoid arthritis and systemic lupus erythematosus (SLE), though this page focuses on its role in travel health and malaria prophylaxis.
Jak funguje Chloroquine?
Chloroquine acts primarily against blood-stage malaria parasites. It accumulates within the parasite’s digestive vacuole and interferes with the detoxification of haem — a toxic byproduct of haemoglobin digestion. By inhibiting the formation of haemozoin (the non-toxic form of haem), Chloroquine causes haem to accumulate to toxic levels within the parasite, ultimately killing it.
Chloroquine is effective against the asexual (blood-stage) forms of sensitive Plasmodium species. It does not eliminate dormant liver-stage parasites (hypnozoites) of P. vivax and P. ovale, which are responsible for malaria relapse — a separate treatment with primaquine may be required after a Chloroquine course in these cases.
Pro koho je určen/a Chloroquine?
Chloroquine prophylaxis is appropriate for travellers visiting specific malaria-endemic regions where the local Plasmodium strains retain sensitivity to Chloroquine. The WHO and European travel medicine guidelines recommend Chloroquine only for destinations without significant P. falciparum resistance.
Travellers should obtain a current destination-specific risk assessment before departure, as resistance patterns can shift. An independent doctor reviewing your travel health assessment will consider:
- Your specific destination(s) and itinerary
- Duration and type of travel (urban vs. rural, accommodation type)
- Your full medical history and current medications
- Any contraindications to Chloroquine or alternative antimalarials
Chloroquine is not recommended for destinations with documented widespread Chloroquine-resistant P. falciparum malaria, including most of sub-Saharan Africa, Southeast Asia, and parts of South America. Malarone, Doxycycline, or Lariam are typically preferred for these regions.
Dávkování
For malaria prophylaxis in adults, the typical schedule as guided by WHO recommendations is:
| Phase | Adult Dose | Timing |
|---|---|---|
| Loading | 500 mg (base 300 mg) | Weekly |
| Pre-travel | Start 1–2 weeks before departure | — |
| During travel | Continue weekly | Throughout stay |
| Post-travel | Continue weekly | 4 weeks after leaving risk area |
Chloroquine is available as tablets. Doses should be taken on the same day each week, ideally with food to reduce gastric side effects.
Dosing for children is weight-based and must be determined by a qualified medical professional. This page does not constitute prescribing advice.
Vedlejší účinky
Common side effects
- Nausea and vomiting (reduced by taking with food)
- Abdominal discomfort or cramps
- Headache
- Dizziness
- Pruritus (itching), which may be more pronounced in patients of African descent — often not an allergic reaction but a pharmacological effect
Less common side effects
- Visual disturbances, including blurred vision and difficulty focusing
- Skin rashes or discolouration with prolonged use
- Mood changes or sleep disturbance
Serious but rare side effects
- Retinopathy: Long-term or high-dose use of Chloroquine can cause damage to the retina. For short-term travel prophylaxis, this risk is very low, but patients with pre-existing eye conditions should inform their doctor before starting treatment.
- Cardiac effects: Chloroquine can prolong the QT interval on an ECG. This is more relevant at treatment doses than prophylactic doses, but patients with known cardiac arrhythmias or those taking other QT-prolonging medicines should discuss this with their doctor.
- Serious haematological effects: Rare; more common in patients with glucose-6-phosphate dehydrogenase (G6PD) deficiency.
Chloroquine vs alternativy
The choice of antimalarial depends heavily on your travel destination and individual medical circumstances. The table below is for informational purposes only.
| Medicine | Dosing | Main Use | Resistance Limitation |
|---|---|---|---|
| Chloroquine | Weekly | Sensitive malaria regions only | High resistance in most P. falciparum areas |
| Malarone (Atovaquone/Proguanil) | Daily | First-choice for most destinations | Minimal known resistance |
| Doxycycline | Daily | Broad-spectrum prophylaxis | Low resistance risk |
| Lariam (Mefloquine) | Weekly | High-risk areas | Some resistance in SE Asia |
Jak získat Chloroquine online v Evropě
Chloroquine requires a prescription from a licensed medical professional in most EU member states when obtained through medical channels. Prescrivia operates as a technology intermediary — we do not prescribe medicines, employ doctors, or sell medicines. Our platform connects patients with independent EU-registered doctors who can conduct online travel health assessments.
The process is as follows:
- Complete a travel health assessment: Provide information about your destination, travel dates, planned activities, and full medical history.
- Posouzení lékařem: An independent EU-registered doctor reviews your assessment. If Chloroquine is clinically appropriate for your destination and health profile, they may issue a prescription.
- Předpis a vyřízení: If a prescription is issued, it is forwarded to a licensed EU pharmacy partner for dispensing and delivery.
Important: Prescrivia does not guarantee that a prescription will be issued. All prescribing decisions are made independently by qualified medical professionals.
Důležité bezpečnostní informace
Do not take Chloroquine if you:
- Have a known hypersensitivity to Chloroquine or related 4-aminoquinolines
- Have a history of retinal or visual field changes attributable to Chloroquine or hydroxychloroquine
- Have psoriasis (may trigger a severe attack)
- Are travelling to a destination with documented Chloroquine-resistant malaria
Tell your doctor before taking Chloroquine if you have:
- G6PD deficiency (risk of haemolysis)
- Epilepsy or a history of seizures
- Liver or kidney impairment
- Heart rhythm disorders or QT prolongation
- Myasthenia gravis
Lékové interakce: Chloroquine may interact with antacids (reduced absorption), medicines that prolong the QT interval, antiepileptics, and antidiabetic drugs. Disclose all current medications to your doctor during the assessment.
Zdroje
Lékařské informace na této stránce vycházejí z následujících zdrojů:
- World Health Organization (WHO). International Travel and Health: Malaria. who.int
- European Medicines Agency (EMA). Product information for Chloroquine-containing medicines. ema.europa.eu
- WHO. Guidelines for the Treatment of Malaria, 3rd edition. Geneva: WHO, 2015.
- Centers for Disease Control and Prevention (CDC). Malaria: Choosing a Drug to Prevent Malaria. cdc.gov
This content is provided for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional for advice relevant to your individual health circumstances and travel plans.
Frequently asked questions
- K čemu se používá Chloroquine?
- Chloroquine is one of the oldest antimalarial medicines and is used for the prevention and treatment of malaria caused by Plasmodium vivax, P. malariae, P. ovale, and sensitive strains of P. falciparum. It is also used to treat certain autoimmune conditions such as rheumatoid arthritis and lupus.
- Which countries is Chloroquine still effective in?
- Due to widespread resistance, Chloroquine is now only recommended for malaria prophylaxis in limited regions where P. falciparum remains sensitive to it. The WHO recommends consulting an updated travel health advisory before departure, as resistance patterns change. It may still be appropriate for parts of Central America, the Caribbean, and the Middle East.
- Jaký je rozdíl Chloroquine taken for malaria prevention?
- For malaria prophylaxis, Chloroquine is typically taken once weekly. It should be started 1-2 weeks before entering a malaria-risk area and continued for 4 weeks after leaving. An independent doctor will determine whether Chloroquine is appropriate for your specific destination.
- Mohu získat Chloroquine online v Evropě?
- Přístup k přípravku můžete získat prostřednictvím online zprostředkovatelských platforem, které Vás spojí s nezávislými lékaři registrovanými v EU. Po vyplnění důvěrného zdravotního dotazníku lékař posoudí, zda je lék pro Vás klinicky vhodný.
- Jaké jsou nejčastější vedlejší účinky?
- Common side effects include nausea, vomiting, abdominal pain, headache, and skin itching (particularly in people of African descent). Less commonly, Chloroquine can affect vision (retinopathy) with long-term use. Regular eye examinations are recommended for patients on prolonged courses.
Léčba
Prescrivia je pouze zprostředkovatelská platforma. Neposkytujeme lékařské služby, nepředepisujeme léčbu ani nevydáváme léky. Všechna lékařská rozhodnutí činí nezávislí lékaři registrovaní v EU. Všechny léky vydávají licencované lékárny v EU. Tato platforma usnadňuje spojení mezi pacienty a poskytovateli zdravotní péče.