Brand Names:
Zovirax, Zovir

Drug Type: Antiviral


Acyclovir (also referred to as aciclovirum or acycloguanosine) is an antiviral drug used for the treatment of herpes simplex virus infections. In humans, acyclovir is used to treat the varicella zoster virus (chickenpox) and herpes zoster virus (shingles). Since Marek's disease virus is also a herpes virus, it has been studied for it's use in the treatment of Marek's Disease in birds.

Drug Form. Acyclovir is available in the form of a tablet (200 mg), powder (50 mg/ml), suspension (40 mg/ml), capsule (200 mg), or as a topical ointment.

Typical Dosage: 80 mg/kg given 3 times a day orally. If given in food, can be up to 240 mg/kg.
  • Kidney damage
  • Increased thirst
  • Lethargy
  • Seizures
  • Tremors
  • Coma
  • Behavioral changes
  • Teriflunomide: The serum concentration of Aciclovir can be increased when it is combined with Teriflunomide.
  • Tizanidine: The serum concentration of Tizanidine can be increased when it is combined with Aciclovir.