In November 2010, the United States Food and Drug Administration (FDA) withdrew all medications that contain propoxyphene from the market. It has been determined that the risks of propoxyphene outweigh the possible benefits. In particular, the FDA was concerned about the drug's ability to cause serious changes in the heart rhythm, even at normal doses. Pharmacies will no longer sell this medication, and people who take it should stop and ask their healthcare provider for a more suitable pain medication.
The pain medication Darvon® (propoxyphene hydrochloride) is generally safe and well tolerated. However, it can cause dangerous side effects and may not be suitable for everyone. For example, this medicine may not be suitable for people with a history of drug or alcohol dependence.
Side effects that may occur during treatment include dizziness, drowsiness, and nausea. Seek immediate medical attention if you develop potentially serious reactions, such as seizures, hallucinations, or difficulty breathing.
Be careful not to exceed the maximum recommended daily dose, as this could lead to overdose symptoms. In some cases, an overdose can be lethal within 15 minutes. Because it is very dangerous in the case of an overdose, Darvon should be prescribed cautiously to people with depression or suicidal tendencies.
(To learn more about the dangers of this drug, click Darvon Side Effects or Darvon Warnings and Precautions.)