No, not a drug to cure deafness, one to cause it temporarily.
Think about it, how useful that could be. Shut one or two of senses down for a few hours. How many times have you been tired enough to sleep, just it’s been too noisy. Earplugs don’t help that much. Wouldn’t it be great to pop a pill and shut your ears off for, let’s say the duration of a transatlantic flight. Or a long train ride in China.
Why has no-one come up with something like this?