testosterone therapy sperm counts

My husband is on testosterone therapy, and we are getting ready to do IVF with Donor Eggs.  My question is, I know they are going to want him to come off of the testosterone to get his counts up, and I was wondering if there is something else he could take in the mean time.  If he doesn't take it, he has no energy, and cannot stay awake after 8:30pm.  Not to mention it kind of kills his sex drive.  Any recommendations you could suggest would be greatly appreciated.

Thanks