It's inane to suggest anything labeled "medication" should only be taken in life-threatening circumstances. Everything you ingest is going to have an impact on your body - some good, some bad, many both. Medications have a particularly strong impact, but are also highly controlled. You can judge the probability of various outcomes very well, which makes it a lot easier to come to a clear conclusion about using them or not.
And I'm going to assume you didn't intend to say that merely going to the doctor should be avoided except in life-threatening circumstances.