I need to find the article again but yes. The UK did a lot of research in to preventing suicide and did a couple of simple things. The most common method of suicide was OTC painkiller overdose. They stopped you being able to buy more than 16 paracetamol (acetaminophen) at a time and they had to packaged in individual blister packs and not bottles.

They reckoned if you could delay someone's ability to take act on taking their own life by about 10 minutes, the probability of them following through goes down drastically. Buying multiple packs from different shops and then individually popping out a load of pills created that delay.

90% of people who attempt suicide and fail, do not reattempt. Americans don't attempt suicide much more frequently than other nations, but the success rate of firearms suicides (which are disproportionately represented in America) is far higher than any other method.