I am a student of 22 years of age. I had revital H tablets for 3-4 days regularly one tab. Thinking that it might make me fit and active all day long so dat I can be active in classes and studying at home. But I didn't get much effect of it and seem like have a reverse effect. Feel like sleeping more in the day time and my lower back also pains making me feel like sleeping all time. So is revital safe. Or any other medicine I can be suggested of.