Arex-40 IM Injection

Arex-40 is a potent and rapidly acting blood schizontocide, which is highly efficacious in treating chloroquine-resistant falciparum malaria, and complicated falciparum malaria including cerebral malaria. Its quick onset of effect and high efficacy in bringing down the parasite load are the properties which make this drug a suitable therapeutic option against falciparum infection.


Arex-40 is used for Malaria, Schistosomiasis.

Arex-40 is also used to associated treatment for these conditions: Plasmodium Infections, Acute, uncomplicated Malaria caused by plasmodium falciparum

Trade Name Arex-40
Generic Artemether
Other Names Artemetero, Artemether, Artemetherum, Artemisininelactol methyl ether, Dihydroartemisinin methyl ether, Dihydroqinghaosu methyl ether, methyl-dihydroartemisinine
Weight 40mg/ml
Type IM Injection
Formula C16H26O5
Weight Average: 298.3746
Monoisotopic: 298.178023942
Protein binding

Artemether and lumefantrine are both highly bound to human serum proteins in vitro (95.4% and 99.7%, respectively). Dihydroartemisinin is also bound to human serum proteins (47% to 76%).

Therapeutic Class Anti-malarial drugs
Manufacturer Jayson Pharma Ltd
Available Country Bangladesh
Last Updated: June 23, 2021 at 11:16 am


Arex-40 dosage

Adult: 80 mg twice daily for 1 day followed by 80 mg once daily for 4 days. Maximum dose: 480 mg for 5 days.

Children: 3.2 mg/kg/day in 2 divided doses followed by 1.6 mg/kg/day once daily for 4 days. Maximum dose: 9.6 mg/kg for 5 days.

Side Effects

Mild Gl disturbance, dizziness, tinnitus, reduction in reticulocyte and leucocyte counts, nausea, vomiting, abdominal pain, bradycardia, first degree heart block, transient increase in serum transaminases.


Avoid concomitant use of drugs known to prolong QT interval or monitor such patients.


Arex-40 causes QT prolongation in some patients. Thus concomitant use of erythromycin, terfenadine, procainamide, quinidine, disopyramide, amiodarone, bretylium, bepridil, sotalol, astemizole, probucol, tricyclic antidepressants, phenothiazines may be avoided.

Food Interaction

  • Avoid grapefruit products.
  • Take with food. Food increases absorption.

Half Life

Arex-40, 1.6 +/- 0.7 and 2.2 +/- 1.9 hr; Dihydroartemisinin, 1.6 +/- 0.6 and 2.2 +/- 1.5 hr

Pregnancy & Breastfeeding use

Pregnancy Category-C. Animal reproduction studies have shown an adverse effect on the fetus and there are no adequate and well-controlled studies in humans, but potential benefits may warrant use of the drug in pregnant women despite potential risks


Contraindicated in patients with hpersensitivity to Arex-40.