First-lineAvloclor

Chloroquine

4-aminoquinoline antimalarial

Safe in pregnancy for prophylaxis & treatment in chloroquine-sensitive zones.

Oral

First-line for

  • Malaria prophylaxis in pregnancy (sensitive areas)
  • Uncomplicated P. vivax / P. ovale malaria

Mechanism

Accumulates in plasmodial food vacuole → inhibits haem polymerisation → toxic free haem kills parasite.

“CQ-sensitive zones only”

  • Resistant P. falciparum → use quinine + clindamycin or artemether-lumefantrine
  • Add primaquine ONLY after delivery (haemolysis)

Dosing

Prophylaxis
310 mg base PO weekly, start 1–2 wk before travel through 4 wk after
Treatment
600 mg base PO, then 300 mg at 6, 24, 48 h

Contraindications

  • AbsoluteChloroquine-resistant areas
  • CautionRetinopathy, G6PD, long QT, psoriasis

Side effects

  • GI upset
  • Pruritus (esp. dark skin)
  • Retinopathy (long-term)
  • QT prolongation

Fetal & maternal notes

  • Safe T1–T3 at antimalarial doses
  • Compatible with breastfeeding

Key interactions

  • QT-prolonging drugs

    Avoid

    Torsades

  • Antacids

    Caution

    ↓ absorption

  • Cyclosporin

    Caution

    ↑ levels

Clinical pearls

  • 💡 Defer primaquine for relapse prevention until after delivery + G6PD check
  • 💡 Annual ophthalmology if used long-term

Content last reviewed: REPLACE_ME (e.g. 2026-07)

Spotted something out of date? See our disclaimer or use Report an Error above.

For educational use only

Not medical advice. Verify dosing against the BNF and your local trust guidelines before prescribing.