What are the side effects to testo-sting?

I have only just discovered my boyfriend is taking this I found it in his backpack, I think he have become snappy and moody I want some advice back I approach him can anyone help?What are the side effects to testo-sting?
This is a dodgy body building substance, it is described as a testosterone booster. I could not find any articles that be anything other than pseudo-science. No one appears to hold actually tested or classified this drug properly. This is worrying within itself!
All steroids have side effects and you entail to discuss your worries with your boyfriend. be non judgemental and non confrontational.
Testosterone can bring aggro if abused not used so precision here till you find out why he has it.