The disposition of theophylline was studied on four occasions in eight healthy adult males. The control mean theophylline half-life and clearance were 7.32 h and 086 ml min-Ikg-', respectively. After 5 days pretreatment with placebo the corresponding values of 7.01 and 0-88 were not significantly di
Effect of cimetidine and ranitidine on the hepatic and renal elimination of nicotine in humans
β Scribed by R. Bendayan; J. T. Sullivan; C. Shaw; R. C. Frecker; E. M. Sellers
- Publisher
- Springer
- Year
- 1990
- Tongue
- English
- Weight
- 612 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0031-6970
No coin nor oath required. For personal study only.
β¦ Synopsis
In a randomized, double-blind, cross-over experiment, 6 healthy consenting male subjects were administered cimetidine 600 mg or ranitidine 300 mg or placebo p.o. q12h x 2 days. Nicotine bitartrate was administered i.v. on day 2 (1 microgram/kg/min) x 30 min. After cimetidine mean nicotine total and metabolic clearances were decreased by 30% and 27% while after ranitidine the clearances were decreased by 10% and 7% respectively. Since smokers regulate their smoke intake based in large part on their nicotine blood levels these results suggest that the diminished nicotine total clearance in the presence of cimetidine could be important in assisting smoking reduction or cessation.
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Cimetidine and ranitidine absorption were studied after oral administration to rabbits, alone or in combination with oral and intravenous domperidone. Blood samples were collected before and 0.25, 0.5, 0.75, 1.0, 1.5, 2.0, 3.0, 4.5, and 6.0 h after cimetidine and ranitidine administration. Assays of
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