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Old 09-10-2015, 10:10 AM
Healthgirl Healthgirl is offline
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Join Date: Dec 2014
Posts: 791
10 yr Member
Healthgirl Healthgirl is offline
Member
 
Join Date: Dec 2014
Posts: 791
10 yr Member
Default Simple meaning of half life?

Does half life mean how long a medicine is effective or just how long it takes the body to excrete it?
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