What over the counter medicene is used to make people passout?

There is no over-the-counter medicine that is safe or approved for inducing unconsciousness. Some substances, like diphenhydramine (found in certain antihistamines), can cause drowsiness and sedation, but using them to intentionally induce unconsciousness is dangerous and can be harmful. Misusing medications in this way can lead to serious health risks, including overdose and complications. Always consult a healthcare professional for safe medication use.