Is it okay to eat medicine after being vaccinated?

The TB shot isn't a vaccination, it's a skin test that should be "Read" three days ofter given. If the shot area turns red in that time, it could mean you were exposed to TB or have TB. A vaccination exposes your body to a dead form of the virus which triggers your body into developing immunity. Most likely he gave the test to see if you had TB. It would be okay to take the medicine, the TB shot doesn't affect the medicine.