sir,i am an IIT aspirant.I had got addicted of drugs few months ago,but now i have partially left it....i mean my intaking of some drugs like marijuana is limited....but it has affected my mental ability...i am a good student but now i am unable to maintain my academic strength...i mean marijuana has affected my IQ level ,my concentration level as well as and my memory...i am unable to memorize my subjects...like what i have learnt today,i forget it within 2 or 3 days....plzzz suggest me some remedies so that i could be able to achieve mah target.....and one more thing sir, i have left those drugs..but then also i am unable to improve my academics..... :-( plz help me