Dissolution and bioavailability of the anhydrate and trihydrate forms of ampicillin. 1975

S A Hill, and K H Jones, and H Seager, and C B Taskis

The solubilities and intrinsic dissolution rates of ampicillin anhydrate and trihydrate in distilled water and dilute hydrochloric acid at 37 degrees have been measured. The dissolution rates of these materials from loose filled hard gelatin capsules were determined and the in vivo bioavailabilities of the compounds compared. Small differences in the in vitro behaviour of the anhydrate and trihydrate forms were recorded but the in vivo availability of the two compounds was the same.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D002621 Chemistry A basic science concerned with the composition, structure, and properties of matter; and the reactions that occur between substances and the associated energy exchange.
D004339 Drug Compounding The preparation, mixing, and assembly of a drug. (From Remington, The Science and Practice of Pharmacy, 19th ed, p1814). Drug Formulation,Drug Preparation,Drug Microencapsulation,Pharmaceutical Formulation,Compounding, Drug,Formulation, Drug,Formulation, Pharmaceutical,Microencapsulation, Drug,Preparation, Drug
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000667 Ampicillin Semi-synthetic derivative of penicillin that functions as an orally active broad-spectrum antibiotic. Penicillin, Aminobenzyl,Amcill,Aminobenzylpenicillin,Ampicillin Sodium,Ampicillin Trihydrate,Antibiotic KS-R1,Omnipen,Pentrexyl,Polycillin,Ukapen,Aminobenzyl Penicillin,Antibiotic KS R1,KS-R1, Antibiotic,Sodium, Ampicillin,Trihydrate, Ampicillin
D001682 Biological Availability The extent to which the active ingredient of a drug dosage form becomes available at the site of drug action or in a biological medium believed to reflect accessibility to a site of action. Availability Equivalency,Bioavailability,Physiologic Availability,Availability, Biologic,Availability, Biological,Availability, Physiologic,Biologic Availability,Availabilities, Biologic,Availabilities, Biological,Availabilities, Physiologic,Availability Equivalencies,Bioavailabilities,Biologic Availabilities,Biological Availabilities,Equivalencies, Availability,Equivalency, Availability,Physiologic Availabilities
D001702 Biopharmaceutics The study of the physical and chemical properties of a drug and its dosage form as related to the onset, duration, and intensity of its action. Pharmaceutics,Pharmaceutic

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