This is exactly my question. We know that many painkillers work on the pain caused by heartbreak, for example. Does this effect have a similar root cause? If so

This is exactly my question. We know that many painkillers work on the pain caused by heartbreak, for example. Does this effect have a similar root cause? If so, it would be reasonable to conclude that many painkillers would cause this as well. The advice in the article would therefore be at best useless.