Please check your internet connection and try again.
# Arsil (Artemisin/Lumefantrine)
## Overview
Arsil is a fixed-dose combination antimalarial consisting of artemether (a fast-acting artemisinin derivative) and lumefantrine (a longer-acting partner drug). It is primarily used to treat uncomplicated *Plasmodium falciparum* malaria.
## Primary Indications
Treatment of acute, uncomplicated *Plasmodium falciparum* malaria in adults and children (typically >5 kg).
## Adult Dosing
Standard regimen is a 6-dose course over 3 days (at 0, 8, 24, 36, 48, and 60 hours).
* **Adults (>35 kg):** 4 tablets per dose (total 24 tablets).
* **Maximum Dose:** Do not exceed 24 tablets per treatment course.
## Pediatric Dosing
Dosing is strictly weight-based:
* **5 kg to <15 kg:** 1 tablet per dose.
* **15 kg to <25 kg:** 2 tablets per dose.
* **25 kg to <35 kg:** 3 tablets per dose.
* **≥35 kg:** 4 tablets per dose.
## Dose Adjustments
* **Renal/Hepatic Impairment:** No specific guidelines; use with caution in severe impairment.
* **Vomiting:** If the patient vomits within 30 minutes of dose administration, the dose should be repeated.
## Contraindications
* Known hypersensitivity to artemether or lumefantrine.
* Severe malaria (use intravenous artesunate instead).
* History of QT prolongation or congenital long QT syndrome.
* Concomitant use with strong CYP3A4 inducers (e.g., rifampin, carbamazepine, phenytoin).
## Adverse Effects
* **Common:** Headache, dizziness, anorexia, fatigue, arthralgia, myalgia.
* **Serious:** QT interval prolongation, hypersensitivity reactions.
## Key Drug Interactions
* **CYP3A4 Inhibitors/Inducers:** May significantly alter lumefantrine plasma concentrations.
* **QT-prolonging agents:** Avoid concurrent use (e.g., haloperidol, quinolones, erythromycin).
* **Hormonal Contraceptives:** Efficacy may be reduced; use barrier methods during and until the next cycle.
## Monitoring
* Monitor for signs of QT prolongation in predisposed patients (ECG if clinically indicated).
* Monitor for clinical resolution of fever and parasitemia.
* Assess for potential drug-drug interactions if the patient is on chronic therapy.
## Clinical Pearls
* **Importance of Fat:** Absorption of lumefantrine is significantly increased when taken *with* food. Advise patients to take doses after the first dose with milk, porridge, or fatty food to ensure bioavailability.
* **Compliance:** The 6-dose regimen is mandatory for curative success; ensure patient adherence to the 3-day schedule.
* **Follow-up:** Arsil is not effective for malaria prevention and does not treat hypnozoites of *P. vivax* or *P. ovale*.
***
**Educational Disclaimer:** This information is for educational purposes only. Always consult current institutional guidelines, local malaria treatment protocols, and official package inserts before prescribing or administering medication. Clinical practice varies by geography and local resistance patterns.
