I have a friend for who it's really hard to gain weight and muscle mass. He is using steroids but he have problems to gain as much as he wants anyway so I told him that he should try to add insulin to his steroid cycle. But that was just a suggestion and I told him to read a lot about it because it can literally kill you. I told him to use it in the morning and post workout with a lot of fast acting carbohydrates after every injection.
Well, the problem is that insulin is very available in this country and you can easily get it at the pharmacy without a prescription. So after I suggested it to him, he went to the pharmacy and bought insulin.
The reality is that he doesn't even know what foods have carbohydrates in it, and he injected it without any carbs at all.
I told him how to know when you are getting hypo and then he must eat or drink carbs immediately. But the guy is not listening.
Next day he injected himself with 5iu's in the morning and went to work without eating breakfast. Once he started driving to work he started to feel dizzy and very light headed. He stopped next to McDonald's to get some food, but he was unable to eat in time and passed out, and was actually in the glycemyc coma for about 5 hours. Good thing that his friend was together with him, and he knew that he used insulin. He told that to doctors and they injected him something and he woke up after few hours without any health issues. But he got pretty scared and said that won't ever use insulin again.
Moral of the story - don't use insulin if you are stupid.