Which substances are athletes increasingly using to enhance their performance?

Which organ is most affected by the consumption of alcohol?

Chronic use of alcohol and drugs causes:

Which medicine is not helpful for patients with mental illnesses like depression and insomnia?

The sensitive period for the psychological and anthropological development of an individual is:

Nayan's friend is consuming drugs. What should Nayan do?
$(i)$ Discuss with the friend's parents. $(ii)$ Bring the matter to the attention of the friend's teacher. $(iii)$ Advise him to stay away from alcohol and drugs. $(iv)$ Try to understand why he is consuming drugs and show empathy. $(v)$ Inform him about the physical harm caused by addiction. $(vi)$ Provide proper guidance and help him stay away from addiction.