I would not recommend this method. I have attempted to overdose twice. I used mixtures of alcohol, diazepam, cocaine, paracetamol, antidepressants, codeine and ibuprofen. I took lots of pills. Both times landed me in hospital, the first I was on a drip for 72 hours and I was very very sick. It's painful and it is incredibly unlikely to succeed but very likely to cause other problems and could potentially get you sectioned.