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Questions & Answers
Side Effects & Adverse Reactions
Acyclovir tablets are intended for oral ingestion only. Renal failure, in some cases resulting in death, has been observed with acyclovir therapy (see ADVERSE REACTIONS: Observed During Clinical Practice and OVERDOSAGE). Thrombotic thrombocytopenic purpura/hemolytic uremic syndrome (TTP/HUS), which has resulted in death, has occurred in immunocompromised patients receiving acyclovir therapy.
There is currently no legal information available for this drug.
FDA Safety Alerts
There are currently no FDA safety alerts available for this drug.
There is currently no manufacturer warning information available for this drug.
FDA Labeling Changes
There are currently no FDA labeling changes available for this drug.
Herpes Zoster Infections: Acyclovir tablets, USP are indicated for the acute treatment of herpes zoster (shingles).
Genital Herpes: Acyclovir tablets, USP are indicated for the treatment of initial episodes and the management of recurrent episodes of genital herpes.
Chickenpox: Acyclovir tablets, USP are indicated for the treatment of chickenpox (varicella).
There is currently no drug history available for this drug.
Acyclovir is a synthetic nucleoside analogue active against herpesviruses. Acyclovir tablets, USP is a formulation for oral administration.
Each Acyclovir Tablet contains 400 mg or 800 mg of acyclovir. In addition, each tablet contains the inactive ingredients colloidal silicon dioxide, magnesium stearate, microcrystalline cellulose, povidone and sodium starch glycolate. The 400 mg and 800 mg tablet also contains ferric oxide and FD&C blue lake # 2 Indigo carmine AL, respectively.
Acyclovir USP is a white to off white crystalline powder, slightly hygroscopic with the molecular formula C 8H 11N 5O 3 and a molecular weight of 225.20. The maximum solubility in water at 37°C is 2.5 mg/mL. The pka's of acyclovir are 2.27 and 9.25.
The chemical name of acyclovir is 6H-Purin-6-one, 2-amino-1,9-dihydro-9-[(2-hydroxyethoxy)methyl]-. It has the following structural formula: