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Flomax (tamsulosin) is an alpha-blocker that relaxes the muscles in the prostate and bladder neck, making it easier to urinate.
Flomax is used to improve urination in men with benign prostatic hyperplasia (enlarged prostate).
Flomax is not approved for use in women or children.
You should not use Flomax if you are allergic to tamsulosin. Do not take tamsulosin with other similar medicines such as alfuzosin (Uroxatral), doxazosin (Cardura), prazosin (Minipress), silodosin (Rapaflo), or terazosin (Hytrin).
Flomax may cause dizziness or fainting, especially when you first start taking it or when you start taking it again. Be careful if you drive or do anything that requires you to be alert. Avoid standing for long periods of time or becoming overheated during exercise and in hot weather. Avoid getting up too fast from a sitting or lying position, or you may feel dizzy.
If you stop taking Flomax for any reason, call your doctor before you start taking it again. You may need a dose adjustment.
Tamsulosin can affect your pupils during cataract surgery. Tell your eye surgeon ahead of time that you are using this medication. Do not stop using Flomax before surgery unless your surgeon tells you to.
There are many other drugs that can interact with tamsulosin. Tell your doctor about all medications you use.
Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.
You should not use Flomax if you are allergic to tamsulosin. Do not take this medicine together with similar medicines such as alfuzosin (Uroxatral), doxazosin (Cardura), prazosin (Minipress), silodosin (Rapaflo), or terazosin (Hytrin).
To make sure Flomax is safe for you, tell your doctor if you have:
liver or kidney disease;
a history of prostate cancer;
low blood pressure; or
an allergy to sulfa drugs.
Flomax can affect your pupils during cataract surgery. Tell your eye surgeon ahead of time that you are using this medicine. Do not stop using Flomax before surgery unless your surgeon tells you to.
Although this medicine is not for use in women, Flomax is not expected to harm an unborn baby. If you are a woman using this medication, tell your doctor if you are pregnant or breast-feeding.
Flomax is not approved for use by anyone younger than 18 years old.
Take Flomax exactly as prescribed by your doctor. Follow all directions on your prescription label. Your doctor may occasionally change your dose to make sure you get the best results. Do not take this medicine in larger or smaller amounts or for longer than recommended.
Flomax is usually taken once a day, approximately 30 minutes after a meal. Try to take this medication at the same time each day.
Do not crush, chew, or open the capsule. Swallow the capsule whole.
Flomax lowers blood pressure and may cause dizziness or fainting, especially when you first start taking it, or when you start taking it again. Call your doctor if you have severe dizziness or feel like you might pass out.
Some things can cause your blood pressure to get too low. This includes vomiting, diarrhea, heavy sweating, heart disease, dialysis, a low-salt diet, or taking diuretics (water pills). Tell your doctor if you have a prolonged illness that causes diarrhea or vomiting.
Your blood pressure will need to be checked often. You will also need to be checked for prostate cancer before and during treatment with Flomax.
You may feel very dizzy when you first wake up. Be careful when standing or sitting up from a lying position.
If you stop taking Flomax for any reason, call your doctor before you start taking it again. You may need a dose adjustment.
Store at room temperature away from moisture and heat.
Read all patient information, medication guides, and instruction sheets provided to you. Ask your doctor or pharmacist if you have any questions.
Usual Adult Dose for Benign Prostatic Hyperplasia:
Initial Dose: 0.4 mg orally once a day
Maximum Dose: 0.8 mg orally once a day
Comments:
-If use is discontinued or interrupted for several days at either the 0.4 mg or 0.8 mg dose, treatment should be initiated again with the 0.4 mg once a day dose.
Use: Treatment of the signs and symptoms of benign prostatic hyperplasia (BPH)
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
If you miss your doses for several days in a row, contact your doctor before restarting the medication.
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
Flomax may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be alert. Avoid getting up too fast from a sitting or lying position, or you may feel dizzy. Get up slowly and steady yourself to prevent a fall.
Dizziness or severe drowsiness can cause falls, accidents, or severe injuries.
To prevent dizziness, avoid standing for long periods of time or becoming overheated during exercise and in hot weather.
Drinking alcohol can increase certain side effects of Flomax.
Get emergency medical help if you have signs of an allergic reaction ro Flomax: hives, rash, itching; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using this medicine and call your doctor at once if you have:
a light-headed feeling, like you might pass out;
penis erection that is painful or lasts 4 hours or longer; or
severe skin reaction--fever, sore throat, swelling in your face or tongue, burning in your eyes, skin pain, followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling.
Common Flomax side effects may include:
dizziness, drowsiness, weakness;
nausea, diarrhea;
headache, chest pain;
abnormal ejaculation, decreased amount of semen;
back pain;
blurred vision;
tooth problems;
fever, chills, body aches, flu symptoms;
runny or stuffy nose, sinus pain, sore throat, cough;
sleep problems (insomnia); or
decreased interest in sex.
This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.
Tell your doctor about all medicines you use, and those you start or stop using during your treatment with Flomax, especially:
blood pressure medicine.
This list is not complete. Other drugs may interact with tamsulosin, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use Flomax only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Medically reviewed by USARx EDITORIAL TEAM Last updated on 1/1/2020.
Source: Drugs.com Flomax (www.drugs.com/flomax.html).
Note: This document contains side effect information about tamsulosin. Some of the dosage forms listed on this page may not apply to the brand name Flomax.
Common side effects of Flomax include: dizziness, nasal congestion, paranasal sinus congestion, rhinitis, rhinorrhea, and seasonal allergic rhinitis. Other side effects include: drowsiness. See below for a comprehensive list of adverse effects.
Applies to tamsulosin: oral capsule
Along with its needed effects, tamsulosin (the active ingredient contained in Flomax) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur while taking tamsulosin:
More common
Less common
Rare
Incidence not known
Some side effects of tamsulosin may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
More common
Less common
Incidence not known
Applies to tamsulosin: oral capsule
The most commonly reported side effects were abnormal ejaculation, influenza-like symptoms, headache, dizziness, and rhinitis.
Very common (10% or more): Infection (up to 10.8%)
Uncommon (0.1% to 1%): Flu like symptoms
Rare (less than 0.1%): Angioedema
Common (1% to 10%): Chest pain
Uncommon (0.1% to 1%): Orthostatic hypotension
Postmarketing reports: Palpitations, hypotension, atrial fibrillation, arrhythmia, tachycardia
Uncommon (0.1% to 1%): Rash, pruritus, urticaria
Postmarketing reports: Stevens-Johnson syndrome, erythema multiforme, exfoliative dermatitis, skin desquamation
Very common (10% or more): Headache (up to 21.1%), dizziness (up to 17.1%)
Common (1% to 10%): Somnolence, insomnia
Rare (less than 0.1%): Syncope
Frequency not reported: Vertigo
Very common (10% or more): Abnormal ejaculation (up to 18.1%)
Common (1% to 10%): Ejaculation disorders, including retrograde ejaculation and ejaculation failure
Uncommon (0.1% to 1%): Semen volume reduced, ejaculation delayed
Postmarketing reports: Priapism
Very common (10% or more): Rhinitis (up to 17.9%)
Common (1% to 10%): Pharyngitis, Increased cough, sinusitis
Uncommon (0.1% to 1%): Nasal congestion
Postmarketing reports: Dyspnea, epistaxis
Common (1% to 10%): Back pain
Common (1% to 10%): Diarrhea, nausea, tooth disorder
Uncommon (0.1% to 1%): Constipation, vomiting
Frequency not reported: Dry mouth
Common (1% to 10%): Blurred vision
Postmarketing reports: Visual impairment, intraoperative Floppy Iris Syndrome (IFIS)
Common (1% to 10%): Asthenia, decreased libido
Uncommon (0.1% to 1%): Fatigue
Common (1% to 10%): Insomnia
Medically reviewed by USARx EDITORIAL TEAM Last updated on 1/1/2020.
Source: Drugs.com Flomax (www.drugs.com/flomax.html).
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