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DRUG INTERACTIONS: Tell your doctor of all nonprescription and prescription medication you may use, especially of: other blood thinners (e.g., warfarin, heparin), aspirin, NSAIDs (e.g., ibuprofen, naproxen). Do not start or stop any medicine without doctor or pharmacist approval.

OVERDOSE: If overdose is suspected, contact your local poison control center or emergency room immediately. US residents can call the US national poison hotline at 1-800-222-1222. Canadian residents should call their local poison control center directly. Symptoms of overdose may include excessive bleeding and bruising, slowed breathing, exhaustion, and muscle twitching.

NOTES: Laboratory tests will be done periodically while using this medication to monitor its effects and to prevent side effects. Do not share this medication with others.

MISSED DOSE: Try to use each dose at the scheduled time. If you miss a dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not "double-up" the dose to catch up.

STORAGE: Store the glass container (ampule) at temperatures between 36 and 86 degrees F (2-30 degrees C) away from light and moisture. Refrigerate the syringe form between 36 and 46 degrees F (2-8 degrees C). Do not freeze these products.

Report Problems to the Food and Drug Administration   You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088. Need help identifying pills and medications? Use the pill identifier tool on RxList.