Can h.g.h (human growth hormone) have any side effects?

Many side effects: The reason hgh is regulated and only used for gh deficiency is because there is a temptation to give it for cosmetic reasons, and it can be dangerous. Google "acromegaly" to see effects of gh excess. Also, you don't always want "growth". Colon polyps, possibly other tumors, and the build up of coronary placque are among the growth effects you don't want. Whatever you're in to, you don't need it!