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Worm and parasite medicines

Praziquantel

Also sold as: Biltricide

Prescription neededWorm and parasite medicines
Comes as:Tablet

Usual adult dose

Dose is set by your doctor and depends on the worm and your weight. Tapeworm: usually a single dose of 5 to 10 mg per kg (25 mg per kg for dwarf tapeworm). Take with food.

Your doctor may give you a different dose. Children's doses depend on weight.

Side effects

Common

  • stomach pain
  • nausea
  • headache
  • dizziness
  • sleepiness

Serious — get help

Stop taking it and see a doctor straight away if you notice:

  • severe allergic reaction
  • seizures (when worm cysts are in the brain)

Do not take it, or take care, if

  • Worm cyst inside the eye
  • Taking rifampicin
  • First 3 months of pregnancy (ask your doctor)
  • Do not drive on the day of treatment and the next day

Interactions

Medicines that can react with this one.

Serious1 medicineDo not take these together unless your doctor says so.
  • Rifampicin

    Rifampicin lowers praziquantel levels so much that treatment can fail; stop rifampicin 4 weeks before if possible.

Moderate2 medicinesTake together only with care. Ask your doctor or pharmacist.
  • Carbamazepine

    Carbamazepine lowers praziquantel levels.

  • Dexamethasone

    Dexamethasone lowers praziquantel levels.

Pregnancy

  1. A
  2. B
  3. C
  4. D
  5. X

Category B

No risk seen in animal studies, but there are few studies in pregnant women. Usually considered safe when needed.

Generic alternatives

Similar medicines your doctor or pharmacist may offer instead.

  • Niclosamide
  • AlbendazoleNo prescription needed
Check with my other medicines

Always follow your doctor or pharmacistThis page is general information, not a prescription. Do not start, stop or change a medicine on your own.