Biomaterial Database

Lack of interaction between valaciclovir, the L-valyl ester of acyclovir, and Maalox antacid. 1996

F de Bony, and R Bidault, and R Peck, and J Posner

Department of Clinical Pharmacology, Laboratoires Wellcome, Issy les Moulineaux, France.

Valaciclovir is rapidly and extensively converted to acyclovir. In this study we investigated the potential interaction between oral valaciclovir and Maalox. On each of three occasions 18 healthy volunteers received a single oral dose of 1000 mg valaciclovir, or 30 mL Maalox 65 min after valaciclovir administration, or 30 mL Maalox 30 min before valaciclovir. Acyclovir plasma concentrations and pharmacokinetic parameters were not significantly affected by administration of Maalox before or after valaciclovir. Therefore, there is no need for restriction of valaciclovir dosing in patients receiving antacid medication.

UI	MeSH Term	Description	Entries
D008276	Magnesium Hydroxide	An inorganic compound that occurs in nature as the mineral brucite. It acts as an antacid with cathartic effects.	Brucite,Magnesium Hydrate,Magnesium Hydroxide (Mg(OH)4),Hydrate, Magnesium,Hydroxide, Magnesium
D008297	Male		Males
D011355	Prodrugs	A compound that, on administration, must undergo chemical conversion by metabolic processes before becoming the pharmacologically active drug for which it is a prodrug.	Drug Precursor,Drug Precursors,Pro-Drug,Prodrug,Pro-Drugs,Precursor, Drug,Precursors, Drug,Pro Drug,Pro Drugs
D012016	Reference Values	The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.	Normal Range,Normal Values,Reference Ranges,Normal Ranges,Normal Value,Range, Normal,Range, Reference,Ranges, Normal,Ranges, Reference,Reference Range,Reference Value,Value, Normal,Value, Reference,Values, Normal,Values, Reference
D004338	Drug Combinations	Single preparations containing two or more active agents, for the purpose of their concurrent administration as a fixed dose mixture.	Drug Combination,Combination, Drug,Combinations, Drug
D004347	Drug Interactions	The action of a drug that may affect the activity, metabolism, or toxicity of another drug.	Drug Interaction,Interaction, Drug,Interactions, Drug
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000077483	Valacyclovir	A prodrug of acyclovir that is used in the treatment of HERPES ZOSTER and HERPES SIMPLEX VIRUS INFECTION of the skin and mucous membranes, including GENITAL HERPES.	2-((2-Amino-1,6-dihydro-6-oxo-9H-purin-9-yl)methoxy)ethyl L-valinate,256U87,Acyclovir, L-valyl Ester,BW256U87,L-Valylacyclovir,Valaciclovir,Valacyclovir Hydrochloride,Valacyclovir Hydrochloride, (DL)-isomer,Valacyclovir, (D)-isomer,Valacyclovir, (DL)-isomer,Valacyclovir, (L)-isomer,Valacyclovir, D-,Valacyclovir, X-Hydrochloride, (D)-isomer,Valacyclovir, X-Hydrochloride, (DL)-isomer,Valtrex,Acyclovir, L valyl Ester,D- Valacyclovir,L Valylacyclovir,L-valyl Ester Acyclovir
D000212	Acyclovir	A GUANOSINE analog that acts as an antimetabolite. Viruses are especially susceptible. Used especially against herpes.	Acycloguanosine,9-((2-Hydroxyethoxy)methyl)guanine,Aci-Sanorania,Acic,Aciclobeta,Aciclostad,Aciclovir,Aciclovir Alonga,Aciclovir-Sanorania,Acifur,Acipen Solutab,Acivir,Activir,Acyclo-V,Acyclovir Sodium,Antiherpes Creme,Avirax,Cicloferon,Clonorax,Cusiviral,Genvir,Herpetad,Herpofug,Herpotern,Herpoviric,Isavir,Laciken,Mapox,Maynar,Milavir,Opthavir,Supraviran,Viclovir,Vipral,Virax-Puren,Virherpes,Virmen,Virolex,Virupos,Virzin,Wellcome-248U,Zoliparin,Zovirax,Zyclir,aciclovir von ct,Aci Sanorania,Aciclovir Sanorania,Acyclo V,Alonga, Aciclovir,Sodium, Acyclovir,Solutab, Acipen,Virax Puren,ViraxPuren,Wellcome 248U,Wellcome248U