What Is The Reason For Pain In The Body When Taking Medication?

Dear Sir

I m Vinod Kumar from Jalandhar. I m facing a health problem which I don’t know even my doctor. My weight is very less and having weakness. Actually whenever I eat any power increasing medicine like Revital, Cobadex, Energic31 any multivitamin capsul, or aurvedic medicine, my body began to ache after two or three days, just like aching in 105 degree fever. When I stopped to take medicine I became normal. I don’t know what is the problem. Kindly Help me.

With thanks