@Shizzo , I'm from a country where paraquat is easily available. As a result, many CTB using this method because they have no other alternative or don't have the resources or cannot overcome SI which is required for some other methods.
During my search for a means of CTB, I discovered that I could purchase paraquat easily, so I searched more about its reliability, peacefulness and speed of action.
I know this is a pro-choice forum and I strongly believe in the right to die for everyone, but I cannot recommend this method of CTB with a clear conscience. I just cannot.
People CTB to get rid of the pain and suffering in their lives. I cannot recommend a method that is only going to guarantee you more pain and suffering. Yes, there is no antidote to paraquat, but that does not mean a certain death either. The success rate of CTB by paraquat is not even near 100%.
So paraquat not only kills slowly (hours to days), it also causes extreme pain and suffering during this time, and death is not 100% guaranteed either. Survivors end up suffering from major organ damage, which only adds to their existing pain and suffering.
I request you to look around for a more peaceful or quick or more reliable method of CTB.