Hi
There is a lot of information in the links below that are good to research and then make the decision on your own method.
Lostallhope shows you different methods as well as success rates
Lostallhope
Peaceful Pill Handbook
You can also download the PPH ebook for more detailed methods
PPH
You can also read through the Sanctioned Suicide forum for the latest information as well as ask for specific help from members.
SS resource compilation
i hope this will help you and give you a lot more knowledge before you make the ultimate decision.
Thanks
London333
Also OTC drugs have one of the lowest success rates and are not recommended.