Hello my age is 30 years and married from one year. I have very low sex desire and erections dysfunction problems. My testosterone levels are low as well. 280 ng/dl. My sugar and b.p levels normal. I consulted a doctor he said you can take testosterone injections sustanon 250 mg by 3 weekly. Can I take this injections or there will be any side effect of this like testicle shrinkage and stop natural productions.