There are no poisons, only poisonous doses.
--Paracelsus

This is an old quote, but it comes fresh on my reading today that the FDA has reduced its recommended dosing for Zolpidem, that is, Ambien. Turns out, many people still had a lot of the drug in their blood in the morning, when they needed to function. Of course we the people already knew that. Women process the drug more slowly. And it also interacts in an unpleasant way with opiates. Many times modern medicine is guilty of overdosing people, especially as we get older and our liver and kidney function decline. So when in doubt, take the smallest possible dose, and if you're into homeopathy, take none and call it some.