Erythromycin

I've been on Erythromycin for 7 days now.
 
I've had the sore stomach cramps but they've gone. Many people say they come back, but i hope not, they're really painful...
 
I'm using Differin cream too, it helps dry up the skin.
 
Erythromycin Bad side effects include
 
Stomach cramps
Very dry skin around eyes
Sore eyes
Some muscle...