acyclovir, Zovirax

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GENERIC NAME: acyclovir

BRAND NAME: Zovirax

DRUG CLASS AND MECHANISM: Acyclovir is an antiviral drug, a synthetic nucleoside analogue, that has inhibitory activity (interferes with viral replication) against the herpes viruses, including herpes simplex 1 and 2 (cold sores and genital herpes), varicella-zoster (shingles and chickenpox), and Epstein-Barr virus (mononucleosis). Viruses take over living cells and reproduce themselves, often at the expense of the host cell. The acyclovir is converted to an active form by the virus itself, and the virus then uses the active form of acyclovir rather than the nucleoside it normally uses to manufacture DNA, a critical component of viral replication. Incorporation of active acyclovir into new viral DNA stops the production of the DNA. Virally infected cells absorb more acyclovir than normal cells and convert more of it to the active form, which prolongs its antiviral activity. The FDA approved acyclovir in March 1982.

PRESCRIPTION: Yes

GENERIC AVAILABLE: Yes

PREPARATIONS:

  • Capsules: 200 mg.
  • Tablets: 400 and 800 mg.
  • Suspension: 200 mg/5 ml.
  • Injection: 50 mg/ml.
  • Powder for injection: 500 and 1000 mg.
  • Ointment: 5%.
Medically Reviewed by a Doctor on 7/24/2014



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