My insurance did not cover lyrica so I took gabapentin instead. I started gaining weight too. I did everything I could with diet and excersise and could not lose a pound. I recently quit taking it and have already lost 5 lbs.My theory is these meds slow everything down including metabolism.
I am unsure of the pharmacology as to why Lyrica causes weight gain but a pharmacologist should be able to tell you. What I can tell you is that you will gain weight very quickly and the more they increase the dose the more weight you will pile on. My dietary habit did not change (I eat a good healthy diet) but the weight piled on. I have now come off it and so as the weight. In just two weeks I am almost back to my original weight!
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