My boyfriend is having trouble getting hard. He is taking meds for a rash on his butt but when he wants sex he can't get hard. This started about a couple weeks ago that he noticed this problem. He is 40 years old and I'm 37. Please help. I tried giving him a hand job and etc.

He didn't have this problem before he started his meds.

Update: He stopped using his meds and he went to the doctors today, but didn't tell his doctor that he was having some side effects to the meds.