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Myrbetriq vs. Flomax

Are Myrbetriq and Flomax the Same Thing?

Myrbetriq (mirabegron) and Flomax (tamsulosin hydrochloride) are used to treat urinary problems.

Myrbetriq is used to treat overactive bladder (OAB) with symptoms of urge urinary incontinence, urgency, and urinary frequency.

Flomax is used to make it easier to urinate for patients with a prostate gland condition called BPH (benign prostatic hyperplasia).

Myrbetriq and Flomax belong to different drug classes. Myrbetriq is a beta-3 adrenergic agonist and Flomax is an alpha-blocker.

Side effects of Myrbetriq and Flomax that are similar include sore throat, diarrhea, headache, dizziness, blurred vision, or nausea.

Side effects of Myrbetriq that are different from Flomax include increased blood pressure, inability to fully empty the bladder (urinary retention), sinus pain, dry mouth, constipation, bloating, memory issues, joint pain, tired feeling, or stomach pain.

Side effects of Flomax that are different from Myrbetriq include lightheadedness, weakness, drowsiness, back pain, dental problems, sleep problems (insomnia), abnormal ejaculation, decreased sex drive, runny or stuffy nose, or cough.

Myrbetriq may interact with metoprolol, desipramine, or digoxin.

Flomax may interact with blood pressure medicines.

What Are Possible Side Effects of Myrbetriq?

Common side effects of Myrbetriq include:

  • drowsiness,
  • dizziness,
  • constipation,
  • nausea,
  • vomiting,
  • loss of appetite,
  • dry mouth, or
  • warmth or redness under the skin.

Tell your doctor if you have any serious side effects of Myrbetriq including:

  • increased blood pressure,
  • the inability to fully empty the bladder (urinary retention),
  • sinus pain,
  • dry mouth,
  • sore throat,
  • diarrhea,
  • constipation,
  • bloating,
  • memory issues,
  • headache,
  • joint pain,
  • dizziness,
  • blurred vision,
  • tired feeling,
  • stomach pain and,
  • nausea.

Tell your doctor if you experience serious side effects of Myrbetriq including

What Are Possible Side Effects of Flomax?

Common side effects of Flomax include:

  • dizziness,
  • lightheadedness,
  • weakness,
  • drowsiness,
  • headache,
  • nausea,
  • diarrhea,
  • back pain,
  • blurred vision,
  • dental problems,
  • sleep problems (insomnia),
  • abnormal ejaculation,
  • decreased sex drive,
  • runny or stuffy nose,
  • sore throat, or
  • cough.

What Is Myrbetriq?

Myrbetriq (mirabegron) is a beta-3 adrenergic agonist used to treat overactive bladder (OAB) with symptoms of urge urinary incontinence, urgency, and urinary frequency.

What Is Flomax?

Flomax (tamsulosin hydrochloride) is an alpha-blocker used to treat the symptoms of a prostate gland condition called BPH (benign prostatic hyperplasia).

SLIDESHOW

Urinary Incontinence in Women: Types, Causes, and Treatments for Bladder Control See Slideshow

What Drugs Interact With Myrbetriq?

Myrbetriq may interact with metoprolol, desipramine, or digoxin.

What Drugs Interact With Flomax?

Flomax may interact with conivaptan, imatinib, isoniazid, antibiotics, antidepressants, antifungals, heart or blood pressure medications, or HIV/AIDS medicines.

Flomax may also interact with cimetidine, cyclosporine, methimazole, pioglitazone, ropinirole, ticlopidine, warfarin, anti-malaria medications, erectile dysfunction medicines, heart rhythm medications, or medicines to treat psychiatric disorders.

How Should Myrbetriq Be Taken?

Myrbetriq is available as a 10 mg tablet and a solution (30 mg per ml) for intravenous (IV) or intramuscular (IM) administration. Myrbetriq solution is administered as a single 15- to 60-mg dose once every 6 hours not to exceed 60 or 120 mg a day. The recommended oral dose is one to two Myrbetriq tablets initially followed by one tablet every 4-6 hours, not to exceed 40 mg daily. Myrbetriq should not be used for more than 5 days.

How Should Flomax Be Taken?

Flomax capsules 0.4 mg once daily is recommended as the dose for the treatment of the signs and symptoms of BPH and dosing should be taken by mouth, usually once daily.

  • Take the first dose at bedtime to minimize the chances of getting dizzy or fainting.
  • After the first dose, take your regularly scheduled dose 30 minutes after the same meal each day.
  • Drug interaction and warnings include that Flomax capsules should not be used in combination with other alpha andrenergic blocking agents.
  • It should not be used in combination with strong inhibitors of CYP3A4 (e.g., ketoconazole).

Flomax capsules 0.4 mg once daily is recommended as the dose for the treatment of the signs and symptoms of BPH and dosing should be taken by mouth, usually once daily.

  • Take the first dose at bedtime to minimize the chances of getting dizzy or fainting.
  • After the first dose, take your regularly scheduled dose 30 minutes after the same meal each day.
  • Drug interaction and warnings include that Flomax capsules should not be used in combination with other alpha andrenergic blocking agents.
  • It should not be used in combination with strong inhibitors of CYP3A4 (e.g., ketoconazole).
Disclaimer

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Any drug information published on RxList.com regarding general drug information, drug side effects, drug usage, dosage, and more are sourced from the original drug documentation found in its FDA drug monograph.

Drug information found in the drug comparisons published on RxList.com is primarily sourced from the FDA drug information. The drug comparison information found in this article does not contain any data from clinical trials with human participants or animals performed by any of the drug manufacturers comparing the drugs.

The drug comparisons information provided does not cover every potential use, warning, drug interaction, side effect, or adverse or allergic reaction. RxList.com assumes no responsibility for any healthcare administered to a person based on the information found on this site.

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You may also report negative side effects of prescription drugs to the FDA by visiting the FDA MedWatch website or calling 1-800-FDA-1088.

Reviewed on 3/20/2019
References

Astellas Pharma US, Inc. Myrbetriq Product Information.
https://www.myrbetriq.com
Sanofi-Aventis. Flomax Product Information.
https://www.4flomax.com/
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