Half life is typically a measure of how long the drug/substance stays in the body.
https://en.wikipedia.org/wiki/Biological_half-life
Efficacy is another thing entirely.
__________________
All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
************************************
.
Weezie looking at petunias 8.25.2017
****************************
These forums are for mutual support and information sharing only. The forums are not a substitute for medical advice, diagnosis or treatment provided by a qualified health care provider. Always consult your doctor before trying anything you read here.