Half-life means duration of drug action?

Posted by Mishal on December 30, 2007, at 23:07:32

If you can help me,
It confuses me when I look at many drugs's half-lifes and the dosage prescribed. For example, Serzone the antidepressant has a very short half-life of maximum 4 hours. Yet it is advised to take twice daily. If the half life of a medicine is only 4 hours, then by taking it twice daily would only make it work for eight hours. Roughly one third of a day (24 hours) Isn't it so?
Or is there any difference between half-life and the duration of drug action?

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Half-life means duration of drug action? Mishal 12/30/07
Re: Half-life means duration of drug action? » Mishal Maxime 12/31/07
Re: Half-life means duration of drug action? » Maxime Mishal 12/31/07
Re: Half-life means duration of drug action? » Mishal Larry Hoover 12/31/07
Re: Larry.. Thanx a lot and happy new year..!! (nm) » Larry Hoover Mishal 12/31/07

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