My 22 year old son came home from work with a rash on his stomach, hands, feet, legs, groin (pretty much everywhere except his face). The rash looks like a sunburn - no raised bumps or lesions. No breathing problems. No fever or other symptoms other than a mild headache. He took two Benadryl about an hour ago with no change to the rash. He started a new medication four days ago (Anabuse). He also takes Lamictal, Lexapro, and Gabapenten. His sister is currently being treated for a viral infection. Could he be having a reaction to the new medication, a combination of the medications, or could he also be fighting the virus?