Learn more about usage, cautions, and possible side effects .
Chemical Name: DOXAZOSIN (dox-AY-zoe-sin)
This medicine is an alpha blocker used to treat high blood pressure and benign prostatic hyperplasia (BPH). It may also be used to treat other conditions as determined by your doctor.
Some medicines or medical conditions may interact with this medicine. INFORM YOUR DOCTOR OR PHARMACIST of all prescription and over-the-counter medicine that you are taking. ADDITIONAL MONITORING of your dose or condition may be needed if you are also taking phosphodiesterase inhibitors (eg, sildenafil, tadalafil, or vardenafil), clarithromycin, HIV protease inhibitors (eg, ritonavir), itraconazole, ketoconazole, nefazodone, telithromycin, or voriconazole. DO NOT START OR STOP any medicine without doctor or pharmacist approval. Inform your doctor of any other medical conditions, including if you have a history of prostate cancer, kidney or liver problems, or high or low blood pressure, allergies, pregnancy, or breast-feeding. Tell your doctor if you will be having eye surgery. Contact your doctor or pharmacist if you have any questions or concerns about taking this medicine.
Follow the directions for using this medicine provided by your doctor. THIS MEDICINE MAY CAUSE A SUDDEN DROP IN BLOOD PRESSURE after the first dose. Take your first dose at bedtime. If you get up during the night, sit up slowly, then stand slowly. This will help to reduce your lightheadedness or dizziness. These effects will more likely occur after the first few doses or if your dose has increased, but can occur at any time while you are taking the medicine. It can also occur if you stop taking the medicine and then restart treatment. TAKE THIS MEDICINE with or without food. STORE THIS MEDICINE at 77 degrees F (25 degrees C), away from heat, moisture, and light. Brief storage at temperatures between 59 and 86 degrees F (15 and 30 degrees C) is permitted. IF YOU MISS A DOSE OF THIS MEDICINE, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. DO NOT take 2 doses at once.
DO NOT TAKE THIS MEDICINE if you have had an allergic reaction to it or are allergic to any ingredient in this product or to any similar medicine (eg, prazosin). DO NOT EXCEED THE RECOMMENDED DOSE or take this medicine for longer than prescribed without checking with your doctor. Laboratory and/or medical tests, including blood pressure, may be performed to monitor your progress or to check for side effects. KEEP ALL DOCTOR AND LABORATORY APPOINTMENTS while you are taking this medicine. This medicine may cause drowsiness, dizziness, lightheadedness, or fainting. DO NOT DRIVE, OPERATE MACHINERY, OR DO ANYTHING ELSE THAT COULD BE DANGEROUS until you know how you react to this medicine. Using this medicine alone, with other medicines, or with alcohol may lessen your ability to drive or to perform other potentially dangerous tasks. THIS MEDICINE MAY CAUSE DIZZINESS, lightheadedness, or fainting. Alcohol, hot weather, exercise, and fever can increase these effects. To prevent them, sit up or stand slowly, especially in the morning. Also, sit or lie down at the first sign of dizziness, lightheadedness, or weakness. Tell your doctor or dentist that you take this medicine before you receive any medical or dental care, emergency care, or surgery (including eye surgery). THIS MEDICINE MAY RARELY CAUSE A PROLONGED, PAINFUL ERECTION. This could happen even when you are not having sex. If this is not treated right away, it could lead to permanent sexual problems such as impotence. Contact your doctor right away if this happens. Patients who take medicine for high blood pressure often feel tired or run down for a few weeks after starting treatment. Be sure to take your medicine even if you may not feel "normal." Tell your doctor if you develop any new symptoms. BEFORE YOU BEGIN TAKING ANY NEW MEDICINE, either prescription or over-the-counter, check with your doctor or pharmacist. CAUTION IS ADVISED WHEN USING THIS MEDICINE IN THE ELDERLY because they may be more sensitive to the effects of the medicine especially low blood pressure. FOR WOMEN: IF YOU PLAN ON BECOMING PREGNANT, discuss with your doctor the benefits and risks of using this medicine during pregnancy. IT IS UNKNOWN IF THIS MEDICINE IS EXCRETED in breast milk. IF YOU ARE OR WILL BE BREAST-FEEDING while you are using this medicine, check with your doctor or pharmacist to discuss the risks to your baby.
SIDE EFFECTS that may occur while taking this medicine include dizziness, drowsiness, lightheadedness, nasal congestion, tiredness, or weakness. If they continue or are bothersome, check with your doctor. CONTACT YOUR DOCTOR IMMEDIATELY if you experience chest pain; fainting; irregular heartbeat; painful, prolonged erection; severe or prolonged dizziness or headache; shortness of breath; swelling of the ankles, feet, or hands; or vision changes. AN ALLERGIC REACTION to this medicine is unlikely, but seek immediate medical attention if it occurs. Symptoms of an allergic reaction include rash; hives; itching; difficulty breathing; tightness in the chest; or swelling of the mouth, face, lips, or tongue. This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your healthcare provider. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
Drug interactions can result in unwanted side effects or prevent a medicine from doing its job. Use our drug interaction checker to find out if your medicines interact with each other. Check drug interactions
If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms may include severe dizziness, drowsiness, or lightheadedness.
DO NOT SHARE THIS MEDICINE with others for whom it was not prescribed. DO NOT USE THIS MEDICINE for other health conditions. KEEP THIS MEDICINE out of the reach of children and pets. IF USING THIS MEDICINE FOR AN EXTENDED PERIOD OF TIME, obtain refills before your supply runs out.
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