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General Information on Acyclovir

Drug Interactions

Acyclovir can potentially interact with a few other medicines (see Drug Interactions With Acyclovir).

What If I Take an Overdose?

People who take too much acyclovir may have overdose symptoms that could include:
  • Agitation
  • Coma
  • Seizures
  • Lethargy
  • Kidney damage.
If you happen to overdose, seek immediate medical attention.
(Click Zovirax Overdose for more information.)

What Should I Do If I Miss a Dose of Acyclovir?

If you do not take your acyclovir as scheduled, take your missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not take a double dose.

Who Makes It?

Acyclovir is made by GlaxoSmithKline.


Acyclovir tablets are available in the following strengths:
  • Acyclovir 400 mg
  • Acyclovir 800 mg.
Acyclovir capsules are available in one strength -- Acyclovir 200 mg.
Acyclovir suspension is available in one strength -- Acyclovir Suspension 200 mg per 5 mL (200 mg per teaspoonful).

Is There a Generic Version of Acyclovir?

Currently, both brand-name and generic versions are licensed for sale (see Generic Zovirax).
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Acyclovir Medication Information

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