Not something that medicine comes in. But medicine does come in the water of a number of large cities in the United States. That's what a five-month study by the Associated Press uncovered. The amounts are tiny. But they're in the drinking water of 41 million people, and they're having impacts on wildlife and throughout the ecosystem.
     One of the reasons the problem wasn't found until now is because standard tests don't search for things like birth control, anti-depression or pain relief medications.
     And researchers and doctors don't know what the likely effects of long-term, low-level exposure to these kinds of drugs are likely to be.