Comparative steady-state bioavailability of Theo-24 and Theo-Dur in healthy men.
Ann Allergy
; 72(3): 218-22, 1994 Mar.
Article
en En
| MEDLINE
| ID: mdl-8129214
This study was designed to compare the steady-state theophylline serum concentrations produced by 800 mg daily doses of Theo-24 and Theo-Dur in normal, healthy men administered according to each product's recommended dosing instructions. Sixteen subjects with theophylline clearances ranging from 0.39 to 0.95 mL/min/kg (average, 0.60 mL/min/kg) and theophylline elimination half-lives ranging from 5.1 to 10.5 hours (average 7.9 hours) completed the study. They were all nonsmokers, who ranged in age from 18 to 44 years and were within 10% of normal weight for their height and build. Theo-24 demonstrated a high extent of absorption (89%, range 54% to 115%) relative to Theo-Dur. Both formulations demonstrated similar times to maximum theophylline concentration (11.3 hours for Theo-24 and 11.5 hours for Theo-Dur), similar peak to trough concentration ratios relative to the trough concentration (74% for Theo-24, 62% for Theo-Dur) and similar periods of time within 5 to 15 mg/L (25.2 to 75.7 mumol/L; 21.4 hours for Theo-24, 19.4 hours for Theo-Dur). No "dose dumping" was demonstrated. The results indicate that Theo-24 dosed at least one hour prior to a high-fat breakfast produces serum theophylline concentrations in a range similar to Theo-Dur administered every 12 hours.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Teofilina
Tipo de estudio:
Clinical_trials
Límite:
Adolescent
/
Adult
/
Humans
/
Male
Idioma:
En
Revista:
Ann Allergy
Año:
1994
Tipo del documento:
Article
Pais de publicación:
Estados Unidos