This medication is used to treat the symptoms of a prostate gland condition called BPH (benign prostatic hyperplasia, also known as enlarged prostate). It is an alpha blocker that works by relaxing the muscles in the bladder neck and prostate. Relaxing these muscles leads to relief of symptoms of BPH such as the feeling of needing to urinate frequently or urgently, difficulty in beginning the flow of urine, weak stream, and the need to urinate during the middle of the night.
This medication should not be used to treat high blood pressure.
OTHER USES: This section contains uses of this drug that are not listed in the approved professional labeling for the drug but that may be prescribed by your health care professional. Use this drug for a condition that is listed in this section only if it has been so prescribed by your health care professional.
Alfuzosin may also be used to help your body "pass," or get rid of, kidney stones through urination.
Read the Patient Information Leaflet provided by your pharmacist before you start using alfuzosin and each time you get a refill. If you have any questions, consult your doctor or pharmacist.
Take this medication by mouth once daily after a meal or as directed by your doctor. This medication works best when taken with food. Taking alfuzosin on an empty stomach may decrease the absorption of this drug and reduce its effectiveness.
Do not crush or chew extended-release tablets. Doing so can release all of the drug at once, increasing the risk of side effects. Also, do not split the tablets unless they have a score line and your doctor or pharmacist tells you to do so. Swallow the whole or split tablet without crushing or chewing.
This medication may cause dizziness and lightheadedness. To avoid injuries such as falls, take your first dose of alfuzosin with food at bedtime until your body adjusts to the effect of the medicine. Also, anytime the dosage of this drug is changed, take your first new dose with food at bedtime.
Use this medication regularly in order to get the most benefit from it. Remember to take it after the same meal each day.
Inform your doctor if your condition persists or worsens.
Dizziness/lightheadedness, headache, or decreased sexual ability may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
Tell your doctor immediately if any of these unlikely but serious side effects occur: unusual tiredness/weakness, severe stomach/abdominal pain, yellowing eyes/skin, persistent nausea/vomiting, dark urine.
For males, in the very unlikely event you have a painful or prolonged erection lasting 4 or more hours, stop using this drug and seek immediate medical attention, or permanent problems could occur.
In the US -
Before taking alfuzosin, tell your doctor or pharmacist if you are allergic to it; or to other alpha blockers such as doxazosin, prazosin, terazosin; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: liver problems.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: other prostate gland problems (e.g., prostate cancer), heart problems (e.g., angina, low blood pressure), kidney disease, certain eye problems (cataracts, glaucoma).
Alfuzosin may cause a condition that affects the heart rhythm (QT prolongation). QT prolongation can infrequently result in serious (rarely fatal) fast/irregular heartbeat and other symptoms (such as severe dizziness, fainting) that need medical attention right away.
The risk of QT prolongation may be increased if you have certain medical conditions or are taking other drugs that may cause QT prolongation. Before using alfuzosin, tell your doctor or pharmacist of all the drugs you take and if you have any of the following conditions: certain heart problems (heart failure, slow heartbeat, QT prolongation in the EKG), family history of certain heart problems (QT prolongation in the EKG, sudden cardiac death).
Low levels of potassium or magnesium in the blood may also increase your risk of QT prolongation. This risk may increase if you use certain drugs (such as diuretics/"water pills") or if you have conditions such as severe sweating, diarrhea, or vomiting. Talk to your doctor about using alfuzosin safely.
This drug may make you dizzy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.
To minimize dizziness and lightheadedness, get up slowly when rising from a sitting or lying position, especially when you first start taking this drug or if your doctor changes your dose. Also, when you first start taking this drug, avoid situations where you may be injured if you faint.
Before having surgery (including cataract/glaucoma eye surgery), tell your doctor or dentist if you are taking or have ever taken this medication, and about all the other products you use (including prescription drugs, nonprescription drugs, and herbal products).
Older adults may be more sensitive to the side effects of this drug, especially dizziness and QT prolongation (see above).
During pregnancy, alfuzosin should be used only when clearly needed. Discuss the risks and benefits with your doctor.
It is unknown if this medication passes into breast milk. Consult your doctor before breast-feeding.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
Some products that may interact with this drug include: drugs to treat erectile dysfunction-ED or pulmonary hypertension (such as sildenafil, tadalafil, vardenafil), other medications that lower blood pressure (e.g., atenolol, diltiazem).
Other medications can affect the removal of alfuzosin from your body, which may affect how alfuzosin works. Examples include azole antifungals (such as itraconazole, ketoconazole), boceprevir, macrolide antibiotics (such as clarithromycin), nefazodone, HIV protease inhibitors (such as lopinavir, ritonavir), a certain combination HIV medication (elvitegravir/cobicistat/emtricitabine/tenofovir), telaprevir, telithromycin, among others.
Many drugs besides alfuzosin may affect the heart rhythm (QT prolongation), including amiodarone, dofetilide, pimozide, procainamide, quinidine, sotalol, macrolide antibiotics (such as erythromycin), among others. Therefore, before using alfuzosin, report all medications you are currently using to your doctor or pharmacist.
If overdose is suspected, contact a poison control center or emergency room immediately. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: fainting, irregular heartbeat.
Do not share this medication with others.
Laboratory and/or medical tests (e.g., prostate exams, prostate-specific antigen or PSA) should be performed periodically to monitor your progress or check for side effects. Consult your doctor for more details.
If you miss a dose, take 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 the dose to catch up.
Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details.
Information last revised August 2014. Copyright(c) 2014 First Databank, Inc.
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