Its his body. The pros and cons of taking or not taking will be felt entirely by him and him alone and needn't tell the world he's on a drug, especially from someone who doesn't do drugs. If any good is coming out of the use of the drug, you should have known by now. Blood tests will show. But no good is coming from this, which is why he is just telling you he is stopping.

Stopping the use of the drug in 2 days does not stop his daily routines and his habit of continued and prolonged exposure to potential COVID-19 patients with no precautions or protection. So think about that too.

Another way to look at it.....The drug could not have any effect on him and if it does, it would be revealed in blood or other tests and this should immediately be told to the world. On the other side, the drug could potentially have adverse effect in which case he is in trouble.