The high price of many prescription drugs in the United States has left millions of Americans telling white lies and committing fraud and other crimes to get their medicines. In response to a New York Times article about the costs, hundreds of readers shared their strategies, like having a physician prescribe twice the needed dose and cutting pills in half, or “borrowing” medicines from a friend or relative with better insurance coverage. But an increasingly popular — though generally illegal — route is buying the drugs from overseas.

The Canadian International Pharmacy Association, a 10-year-old group, said its members fill prescriptions for one million Americans each year. “It’s the Americans who are seeking us out,” said Tim Smith, the group’s general manager. “Clearly there’s a need.”

In surveys from 2011 by the Centers for Disease Control and Prevention, about 2 percent of adults and about 5 percent of the uninsured said they had bought prescription drugs from other countries. The figures most likely underestimated the practice because people may be reluctant to admit to doing something illegal, even though the law is rarely enforced in such cases.

The Food and Drug Administration says on its Web site that “in most circumstances it is illegal to import drugs into the U.S. for personal use” because the agency cannot guarantee they are safe and effective. The government also prohibits “reimportation” of drugs made in the United States because it cannot guarantee the medications were not tampered with or stored improperly.

The agency said it does not track the volume of such imports. However, it “typically does not object” to people buying imported medicine for personal use “under certain circumstances,” the agency said. Those include using the drug to treat a serious condition for which an effective alternative is unavailable in the United States and purchasing less than a three-month supply. But those ambiguous edicts have left patients wary.