I attempted earlier this year. Method was 15 grams of tylenol. I suppose having a lethal amount of pills in your body might be similar to having jumped in some circumstances (not all suicide jumps are equal). It's not scary until several minutes after you've done the act. As I was swallowing the pills, I was only focused on finishing the act. It took at least 15 seconds to down them all. I had counted them out before hand, too. On that day, I had taken a hot shower, and without hesitation, I began swallowing them. I had planned on waiting until I felt my anxiety was low enough to swallow the pills, but I ended up doing so impulsively. It was shockingly easy.
Once you've attempted suicide (where death was a real possibility), the fear of trying again is much lower or not there.