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Flomax
Flomax, the brand name for tamsulosin, is a medication commonly prescribed to treat the symptoms of benign prostatic hyperplasia (BPH), also known as an enlarged prostate. Flomax belongs to a class of drugs called alpha-blockers, which work by relaxing the muscles in the prostate and bladder, making it easier to urinate. It helps relieve symptoms such as difficulty starting urination, weak stream, and the need to urinate frequently or urgently, especially at night.
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Frequently Asked Questions
What should I do if I miss a dose of Flomax?
Take the missed dose as soon as you remember, but skip it if it's close to your next dose. Do not double up on doses.
Can I take Flomax with food?
Yes, Flomax should be taken about 30 minutes after the same meal each day to ensure consistent absorption and effectiveness.
How long does it take for Flomax to work?
Some men notice improvement in their urinary symptoms within a few days, but it may take up to 2-4 weeks to see the full effects.
Can Flomax treat high blood pressure?
No, Flomax is not approved for treating high blood pressure. It is specifically prescribed to manage symptoms of BPH.
Does Flomax affect sexual function?
Flomax may cause side effects such as abnormal ejaculation, including a decrease in semen during ejaculation. If you experience this or other side effects, consult your healthcare provider.
Comprehensive Drug Guide
How Does Flomax Work?
Flomax works by blocking alpha-1 receptors in the smooth muscles of the prostate and bladder neck, leading to muscle relaxation. This allows urine to flow more freely, reducing the symptoms of BPH such as urinary frequency, urgency, and incomplete bladder emptying. Flomax does not affect the size of the prostate itself but improves the ease of urination.
Common Dosages
- 0.4 mg capsules, typically taken once daily.
Typical Dosing
- For BPH: The usual dose is 0.4 mg once daily, 30 minutes after the same meal each day. In some cases, the dose may be increased to 0.8 mg if the response is inadequate after 2 to 4 weeks.
Typical Dosing
FDA Approved Indications
- Treating the symptoms of benign prostatic hyperplasia (BPH) in men.
Who Shouldn't Take Flomax?
- Hypersensitivity to tamsulosin or any of its components
- History of severe sulfa allergy
- Severe hypotension (low blood pressure), as Flomax can cause a further drop in blood pressure
Advice From The Pharmacist
- Take Flomax about 30 minutes after the same meal each day to avoid fluctuations in blood levels.
- Swallow the capsule whole; do not crush or chew it.
- Be cautious when standing up from a seated or lying position, as Flomax can cause dizziness or fainting due to low blood pressure.
- If you miss a dose, take it as soon as you remember, but skip the missed dose if it's close to the next one.
- Always follow your doctor’s instructions closely and avoid stopping the medication abruptly without consulting them.
Side Effects of Flomax
Common Side Effects
- Dizziness
- Headache
- Runny or stuffy nose
- Abnormal ejaculation (such as decreased semen during ejaculation)
Uncommon/Severe Side Effects
- Severe dizziness or fainting
- Priapism (a prolonged and painful erection that lasts more than 4 hours)
- Allergic reactions, such as swelling of the face, lips, or throat
Risks and Warnings of Flomax
- Orthostatic Hypotension: Flomax may cause a sudden drop in blood pressure, especially when standing up from a sitting or lying position, leading to dizziness or fainting. This is more common after the first dose or after a dose increase.
- Intraoperative Floppy Iris Syndrome (IFIS): Flomax has been associated with IFIS during cataract or glaucoma surgery. It is important to inform your ophthalmologist if you are taking or have taken Flomax.
- Priapism: In rare cases, Flomax can cause priapism, a prolonged and painful erection that requires immediate medical attention.
Interactions with Flomax
Common Drug Interactions
- PDE5 Inhibitors (e.g., sildenafil, tadalafil): Combining Flomax with medications used to treat erectile dysfunction may increase the risk of low blood pressure.
- Other Alpha-1 Blockers: Concurrent use with other alpha-blockers may enhance the risk of hypotension.
- Cimetidine: This stomach acid reducer can increase the blood levels of Flomax, leading to a higher risk of side effects.
- Warfarin: Tamsulosin may interact with warfarin, increasing the risk of bleeding.
Alternatives to Flomax
- Alfuzosin (Uroxatral): Another alpha-1 blocker used to treat BPH symptoms.
- Doxazosin (Cardura): A non-selective alpha-blocker that treats both BPH and hypertension.
- Finasteride (Proscar): A 5-alpha reductase inhibitor that helps reduce the size of the prostate and relieve BPH symptoms.
- Dutasteride (Avodart): Another 5-alpha reductase inhibitor that shrinks the prostate over time.
