question about applying prescription ointment on arms and other areas

[Fred]

My only advice would be is that if you have P on your hands get some food you can eat with utensils because the last thing you want is to ingest some of the stuff. Perhaps even wait till you've eaten.

Yep one should always wash your hands after using topicals, Coconut Oil / Olive Oil / Etc is fine as it's a food but prescribed should always be washed off your hands.