Taking too much aspirin could be dangerous. If you have stomach ulcers, have a bleeding or platelet disorder, or have recently had surgery, you may not be able to take this drug. It relieves pain. Aspirin is a less potent pain reliever, as well as an anti-inflammatory and a fever reducer. Aspirin increases the effects of propoxyphene.
Caffeine constricts blood vessels.
This is believed to help relieve tension headaches by constricting dilated blood vessels in the head. Propoxyphene is habit forming and should be used only under close supervision if you have an alcohol or drug addiction. Propoxyphene may cause addiction and withdrawal symptoms as well as other harmful effects in an unborn baby. Propoxyphene may also cause addiction and withdrawal symptoms in a nursing baby. Use extra caution.