Tell your doctor if you have: blood disorders or bleeding episodes, allergies (especially drug allergies). This medication should be used only if clearly needed during pregnancy. Discuss the risks and benefits with your doctor. Since small amounts of this medication are found in breast milk, consult your doctor before breast-feeding.

Dizziness, flushing, stomach upset, loss of appetite, nausea, trembling, weakness or nervousness may occur the first several days as your body adjusts to the medication. If any of these effects continue or become bothersome, inform your doctor. To avoid dizziness and lightheadedness when rising from a seated or lying position, get up slowly. Also limit your intake of alcoholic beverages and avoid overheating which will aggravate these effects. Notify your doctor if you develop: chest pain, a pounding heartbeat, skin rash. If you notice other effects not listed above, contact your doctor or pharmacist.

This medication has been used investigationally to treat dysmenorrhea, threatened abortion and premature labor.