Oh Yes, when you stop taking phen you can gain your weight back and more! Just becareful not to fully rely on the phen for your weight loss. As for as reactions,alot of people do have reactions.They range from getting mad to heart problems.You might want to ask your doc about potassium for cramping.Also, drink alot of water while youare taking phen. If not careful, you can dehydrate. As for as myself, my experience with phen, I go to sleep as if I've taken a sleeping pill.Good-luck on your weight loss! and congradulations on the weight you have already lost!!

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