País: Estados Unidos
Língua: inglês
Origem: NLM (National Library of Medicine)
Acyclovir (UNII: X4HES1O11F) (Acyclovir - UNII:X4HES1O11F)
Nivagen Pharmaceuticals, Inc.
Acyclovir
Acyclovir 200 mg
ORAL
PRESCRIPTION DRUG
Acyclovir capsules is indicated for the acute treatment of herpes zoster (shingles). Acyclovir capsules is indicated for the treatment of initial episodes and the management of recurrent episodes of genital herpes. Acyclovir capsules is indicated for the treatment of chickenpox (varicella). Acyclovir is contraindicated for patients who develop hypersensitivity to acyclovir or valacyclovir.
Acyclovir Capsules (blue, opaque cap and body) containing 200 mg acyclovir and printed with "CP115" and "200" Bottle of 100 (NDC 75834-124-01). Bottle of 500 (NDC 75834-124-05). Store at 15° to 25°C (59° to 77°F) and protect from moisture.
Abbreviated New Drug Application
ACYCLOVIR- ACYCLOVIR CAPSULE NIVAGEN PHARMACEUTICALS, INC. ---------- ACYCLOVIR CAPSULES, USP 200 MG NIVAGEN PHARMACEUTICALS, INC. RX ONLY DESCRIPTION Acyclovir, a synthetic nucleoside analogue active against herpesviruses. Acyclovir Capsules, is a formulation for oral administration. Each Acyclovir Capsule contains 200 mg of acyclovir and the inactive ingredients corn starch, lactose monohydrate, magnesium stearate, and sodium lauryl sulfate. The capsule shell consists of gelatin, FD&C Blue No. 2, and titanium dioxide. Printed with edible black ink. Acyclovir is a white, crystalline powder with the molecular formula C H N O and a molecular weight of 225. 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 2-amino-1,9-dihydro-9-[(2-hydroxyethoxy)methyl]-_6H_- purin-6-one; it has the following structural formula: VIROLOGY MECHANISM OF ANTIVIRAL ACTION Acyclovir is a synthetic purine nucleoside analogue with _in vitro_ and _in vivo_ inhibitory activity against herpes simplex virus types 1 (HSV-1), 2 (HSV-2), and varicella-zoster virus (VZV). The inhibitory activity of acyclovir is highly selective due to its affinity for the enzyme thymidine kinase (TK) encoded by HSV and VZV. This viral enzyme converts acyclovir into acyclovir monophosphate, a nucleotide analogue. The monophosphate is further converted into diphosphate by cellular guanylate kinase and into triphosphate by a 8 11 5 3 number of cellular enzymes. In vitro, acyclovir triphosphate stops replication of herpes viral DNA. This is accomplished in 3 ways: 1) competitive inhibition of viral DNA polymerase, 2) incorporation into and termination of the growing viral DNA chain, and 3) inactivation of the viral DNA polymerase. The greater antiviral activity of acyclovir against HSV compared with VZV is due to its more efficient phosphorylation by the viral TK. ANTIVIRAL ACTIVITIES The quantitative relationship between the _in vitro_ susceptibility of herpes viruses to antivirals and t Leia o documento completo