Drug permeation through membranes. II. Simultaneous dissolution and permeation of drug from solid dosage forms.
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Amobarbital↗
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Results for “DOSAGE FORMS”
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Determination of dopa in pharmaceutical dosage forms based on oxidation at tubular carbon electrode.
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Capsules↗
Survival of Staphylococcus aureus on pharmaceutical oral solid dosage forms.
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Capsules↗
Assay of quaternary ammonium compounds in various dosage forms by acid-dye method.
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Cetylpyridinium↗
Biopharmaceutics of drugs administered in lipid-containing dosage forms. I. GI absorption of griseofulvin from an oil-in-water emulsion in the rat.
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Animals↗
Stability of solids and solid dosage forms.
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Aminosalicylic Acids↗
Selective determination of phenylpropanolamine hydrochloride in pharmaceutical dosage forms by reaction with ninhydrin.
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Acetaminophen↗
Determination of sodium o-iodohippurate in pharmaceutical dosage forms by high-speed liquid chromatography.
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Acetates↗
Suspension polymerization for preparation of timed-release dosage forms.
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Acetaminophen↗
Determination of methyldopa in pharmaceutical dosage forms and biological fluids based on oxidation at the tubular carbon electrode.
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Animals↗
Comparison of spironolactone tablet dosage forms in healthy humans.
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Adult↗
Nonaqueous titration of methaqualone and its dosage forms.
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Acetates↗
Comparison of analysis of isoniazid and its dosage forms by several methods.
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Bromine↗
Letter: Particle-size requirements related to content uniformity of solid dosage forms.
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Drug Compounding↗
Effect of flavoring oils on preservative concentrations in oral liquid dosage forms.
The partitioning of methyl-, ethyl-, propyl-, and butylparabens into flavoring oils from aqueous systems was studied. The partitioning is dependent on the concentration of the flavoring oil, the pH of the aqueous medium, and the nature and concentration of additives to the aqueous medium.
Buffers↗
Determination of estrogens in dosage forms by fluorescence using dansyl chloride.
A sensitive, reproducible, fluorometric procedure for the determination of estrogens in pharmaceutical preparations is presented. The estrogens are determined fluorometrically following their reaction with dansyl chloride. The optimum conditions for the reaction such as pH, reaction solvent composition variations, and speed of reaction are discussed. In addition, a linearity study of the relationship between concentration and fluorescence intensity for estrone, estradiol, and ethinyl estradiol is reported. Solvent extraction procedures based on acid-base behavior or column chromatography are used when necessary to isolate the estrogen prior to reaction with dansyl chloride and fluorometric measurement. The recovery of estrogens from spiked samples indicated that the proposed method is efficient and reproducible. Comparison of the dansyl procedure with the official NF method in the analysis of estrone aqueous suspension showed the proposed method to be accurate and more precise than the NF assay. Estrone aqueous suspension, estradiol in sesame oil, estradiol valerate in castor oil and in sesame oil (in the latter case, in the presence of testosterone), estradiol benzoate in sesame oil, and ethinyl estradiol tablets (0.5 mg/tablet) from commercial sources were satisfactorily analyzed, with average results within compendial limits and no coefficient of variation greater than 2%.
Castor Oil↗
Fluorescence reactions of fluorescamine with levodopa and its derivatives: fluorescence assay of 3-methoxy-4-hydroxyphenylalanine in levodopa dosage forms.
A simple fluorometric method for the quantitation of 3-methoxy-4-hydroxyphenylalanine, either alone or in the presence of levodopa, is presented. Fluorescence is developed by reaction with fluorescamine. The interactions of this reagent with levodopa and a number of its derivatives under various experimental conditions were studied. Negligible fluorescence was obtained with levodopa, dopamine, levodopa benzyl ester, and 6-hydroxydopamine.
Chemical Phenomena↗
Determination of polythiazide in pharmaceutical dosage forms by high-pressure liquid chromatography.
A method is presented for the quantitative analysis of polythiazide tablets by high-pressure liquid chromatography. The powdered tablets are extracted with methanol, containing quinoline as the internal standard, and assayed by comparison of peak heights after liquid chromatography. The chromatographic conditions employed may be adapted for the determination of many other thiazide and nonthiazide diuretics.
Chromatography↗