As for toxicity and side effects, Clomid is considered a very safe drug. Bodybuilders seldom report any problems, but listed possible side effects do include hot flashes, nausea, dizziness, headaches and temporarily blurred vision. Such side effects usually only appear in females however, as they feel the effects of estrogen manipulation much more readily than men. While female athletes can clearly gain some benefit from this substance, estrogen manipulation is probably not the most comfortable way to go about cutting up. Should it still be used for such purposed and side effects do become pronounced, the drug of course is to be discontinued and (at least) a break taken from it.