The generically named medication Tamsu is marketed in the United States with the brand name Flomax. It is prescribed in the treatment of BPH or benign prostatic hyperplasia, the medical term for noncancerous prostate enlargement. The drug works by making the prostate relax so it does not impinge upon the bladder. The Mayo Clinic says that Flomax does not reduce the prostate’s size, but it does improve urination. Sexual side effects of the drug are not that common 2.
If you are experiencing serious medical symptoms, seek emergency treatment immediately.
What Is Flomax
Flomax (Tamsu hydrochloride) is an alpha-blocker used to treat the symptoms of a prostate gland condition called BPH (benign prostatic hyperplasia). Flomax is available as a generic drug.
What should I avoid while taking Tamsu (Flomax)?
Avoid driving or hazardous activity until you know how this medicine will affect you. Your reactions could be impaired. Avoid getting up too fast from a sitting or lying position, or you may feel dizzy.
Before taking Tamsu,
- tell your doctor and pharmacist if you are allergic to Tamsu, sulfa medications, or any other medications.
- tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements and herbal products you are taking or plan to take. Be sure to mention any of the following: other alpha blocker medications such as alfuzosin (Uroxatral), doxazosin (Cardura), prazosin (Minipress), and terazosin (Hytrin); anticoagulants ('blood thinners') such as warfarin (Coumadin); cimetidine (Tagamet); and medications for erectile dysfunction (ED) such as sildenafil (Viagra), tadalafil (Cialis), or vardenafil (Levitra); Your doctor may need to change the doses of your medications or monitor you more carefully for side effects.
- tell your doctor if you have or have ever had prostate cancer or liver or kidney disease.
- you should know that Tamsu is only for use in men. Women should not take Tamsu, especially if they are pregnant or could become pregnant or are breast-feeding. If a pregnant woman takes Tamsu, she should call her doctor.
- if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking Tamsu. If you need to have eye surgery at any time during or after your treatment, be sure to tell your doctor that you are taking or have taken Tamsu.
- you should know that this medication may make you drowsy or dizzy. Do not drive a car, operate machinery, or perform dangerous tasks until you know how this medication affects you.
- you should know that Tamsu may cause dizziness, lightheadedness, a spinning sensation, and fainting, especially when you get up too quickly from a lying position. This is more common when you first start taking Tamsu or after your dose is increased. To help avoid this problem, get out of bed slowly, resting your feet on the floor for a few minutes before standing up. Call your doctor if these symptoms are severe or do not go away.
What Are Side Effects Associated with Using Tamsu?
Common Side effects of Tamsu include:
Postmarketing side effects of Tamsu reported include:
- Prolonged erection (rare)
- Signs and symptoms of low blood pressure, including lightheadedness and fainting
- Infrequent reports of shortness of breath, palpitations, low blood pressure (hypotension), atrial fibrillation, irregular heartbeat (arrhythmia), and fast heart rate
- Visual impairment
- During cataract and glaucomasurgery, a variant of small pupilsyndrome known as Intraoperative Floppy Iris Syndrome (IFIS) has been reported in association with alpha1 blocker therapy
- Skin desquamation including reports of Stevens-Johnson syndrome, erythema multiforme, and dermatitis exfoliative
- Constipation, vomiting, and epistaxis
- Allergic-type reaction (e.g., skin rash, hives, itching, skin swelling, respiratory symptoms) have been reported with positive re-challenge
- Dry mouth
This document does not contain all possible side effects and others may occur. Check with your physician for additional information about side effects.
Tamsu and Grapefruit Juice
Grapefruit may interact with this drug, so it's a good idea to avoid drinking grapefruit while taking this drug.
Tamsu and Alcohol
Since Tamsu can cause dizziness and fainting, it's best to avoid drinking alcohol if you're taking Tamsu.
What is Tamsu (Flomax)?
Tamsu is an alpha-blocker that is used to improve urination in men with benign prostatic hyperplasia (enlarged prostate).
Tamsu is not approved for use in women or children.
Tamsu may also be used for purposes not listed in this medication guide.
What Is Tamsu and How Does It Work?
Tamsu is used by men to treat the symptoms of an enlarged prostate (benign prostatic hyperplasia-BPH). It does not shrink the prostate, but it works by relaxing the muscles in the prostate and the bladder. This helps to relieve symptoms of BPH such as difficulty in beginning the flow of urine, weak stream, and the need to urinate often or urgently (including during the middle of the night).
Tamsu belongs to a class of drugs known as alpha-blockers.
Tamsu is available under the following different brand names: Flomax.
Dosage of Tamsu:
Dosage Forms and Strengths
Dosing Consideraations – Should be Given as Follows:
- 0.4 mg orally once daily, 30 minutes after same meal each day; if response is inadequate after 2-4 weeks, may be increased to 0.8 mg once daily; if therapy is interrupted, should be resumed at 0.4 mg once daily
Relief of symptoms
- 0.4 mg orally once daily
Facilitation of stone expulsion
- 0.4 mg orally once daily; discontinued after successful expulsion (average, 1-2 weeks)
- CrCl 10 mL/min or greater: Dosage adjustment not necessary
- CrCl less than 10 mL/min: Not studied
Pediatric: Safety and efficacy not established
How to take Tamsu
Taking certain antifungals with Tamsu can increase the levels of Tamsu in your body. This raises your risk of side effects from Tamsu. Examples of these drugs include:
- terbinafine (these drugs should be used together cautiously)
- ketoconazole (do not use this drug with Tamsu)
How should I take Tamsu?
Take Tamsu exactly as it was prescribed for you. 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.
Tamsu 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 a capsule. Swallow the capsule whole.
Tamsu 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 Tamsu.
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 Tamsu 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.
What is Tamsu?
Tamsu (Flomax) is an alpha-blocker that relaxes the muscles in the prostate and bladder neck, making it easier to urinate.
Tamsu is used to improve urination in men with benign prostatic hyperplasia (enlarged prostate).
Tamsu is not FDA approved for use in women or children.
It's always important to share with your doctor and pharmacist all prescription, non-prescription, illegal, recreational, herbal, nutritional, or dietary drugs you're taking.
You shouldn't take Tamsu if you're also taking the following drugs:
- Medications for fungal infections like Sporanox (itraconazole), Noxafil (posaconazole), Vfend (voriconazole), and Nizoral (ketoconazole)
- HIV/AIDS medications like Kaletra (lopinavir/ritonavir), Norvir (ritonavir), and Stribild (cobicistat/elvitegravir/emtricitabine/tenofovir)
- Victrelis (Boceprevir)
- Antibiotics like chloramphenicol, Biaxin (clarithromycin) and Ketek (telithromycin)
- Vaprisol (conivaptan)
- Gengraf, Neoral, or Sandimmune (cyclosporine)
- Rescriptor (delarvirdine), Lexiva (fosamprenavir)
- Faverin, Fevarin, Floxyfral, Luvox (fluvoxamine)
- Cancer medications like Gleevec (imatinib)
- Serzone (nefazodone)
- Incivek (telaprevir)
You should also avoid taking Tamsu if you are taking any of the following:
- Other alpha-blocker medications for prostate conditions like Minipress (prazosin), Rapaflo (silodosin), Hytrin (terazosin)
- Quinaglute, Quinidec (quinidine)
- Drugs for depression called selective serotonin reuptake inhibitors (SSRIs) like Zoloft (sertraline) or Prozac (fluoxetine)
- Drugs for depression called tricyclic antidepressants (TCAs) like Paxil (paroxetine), Anafranil (clomipramine), and Norpramin (desipramine)
- Antibiotics like Vibramycin (doxycycline); EryTab, E.E.S., or Erythrocin (erythromycin); Vigamox (moxifloxacin)
- Medications for irregular heartbeat like Cordarone, Nexterone, or Pacerone (amiodarone),444 or Multaq (dronedarone)
- Benadryl (diphenhydramine)
- Medications for mood like Haldol (haloperidol) or Clozaril (clozapine)
Talk to your doctor about any alternatives to Tamsu if you're taking any of these medications.