I read that phentermine becomes less effective at reducing appetite over weeks. I’ve been taking it a very short while— 11 days. The first two days I couldn’t even look at food. I felt great and hunger was gone. Now I am having cravings and hunger headaches and it’s making it significantly harder to stick to my 1,800 calorie plan. What is going on? Any advice?
How quickly does phentermine lose its efficacy?
Question posted by enya21 on 18 Aug 2022
Last updated on 27 August 2022 by MsCourtney210
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Answers
MsCourtney210
27 Aug 2022
I have read that Phentermine should be taken up to 12 weeks at a time. There are different doses out there. My doctor is starting me with 15mg for 90 days and if everything goes well he will increase the dose to 30mg.
To help with your hunger, try drinking about 8oz of water. Usually after I drink some water, my stomach doesn't even want to think about food. Also, try chewing gum. It helps with the dry mouth and it gives your mouth something to do. Sometimes it's good to go over, about 200 cals, from your calorie limit. Sometimes eating more will help the weight come off too.
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Further information
- Phentermine uses and safety info
- Phentermine prescribing info & package insert (for Health Professionals)
- Side effects of Phentermine (detailed)
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