Flomax Recall

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Questions & Answers

Side Effects & Adverse Reactions

The signs and symptoms of orthostasis (postural hypotension, dizziness and vertigo) were detected more frequently in FLOMAX capsule-treated patients than in placebo recipients. As with other alpha-adrenergic blocking agents there is a potential risk of syncope (see ADVERSE REACTIONS).

Patients beginning treatment with FLOMAX capsules should be cautioned to avoid situations where injury could result should syncope occur.

Doses of FLOMAX higher than 0.4 mg (e.g., 0.8 mg) should not be used in combination with strong inhibitors of CYP3A4 (e.g., ketoconazole).

Rarely (probably less than 1 in 50,000 patients), tamsulosin, like other alpha1 antagonists, has been associated with priapism (persistent painful penile erection unrelated to sexual activity). Because this condition can lead to permanent impotence if not properly treated, patients must be advised about the seriousness of the condition (see PRECAUTIONS, Information for Patients).

Legal Issues

There is currently no legal information available for this drug.

FDA Safety Alerts

There are currently no FDA safety alerts available for this drug.

Manufacturer Warnings

There is currently no manufacturer warning information available for this drug.

FDA Labeling Changes

There are currently no FDA labeling changes available for this drug.


Flomax® (tamsulosin hydrochloride) capsules are indicated for the treatment of the signs and symptoms of benign prostatic hyperplasia (BPH). FLOMAX capsules are not indicated for the treatment of hypertension.


There is currently no drug history available for this drug.

Other Information

Tamsulosin hydrochloride is an antagonist of alpha1A adrenoceptors in the prostate.

Tamsulosin hydrochloride is (-)-(R)-5-[2-[[2-(o-Ethoxyphenoxy) ethyl]amino]propyl]-2-methoxybenzenesulfonamide, monohydrochloride. Tamsulosin hydrochloride is a white crystalline powder that melts with decomposition at approximately 230°C. It is sparingly soluble in water and methanol, slightly soluble in glacial acetic acid and ethanol, and practically insoluble in ether.

The empirical formula of tamsulosin hydrochloride is C20H28N2O5S HCl. The molecular weight of tamsulosin hydrochloride is 444.98. Its structural formula is:

Tamsulosin's structural formula

Each FLOMAX capsule for oral administration contains tamsulosin hydrochloride 0.4 mg, and the following inactive ingredients: methacrylic acid copolymer dispersion NF, microcrystalline cellulose, triacetin, calcium stearate, talc, FD&C blue No. 2, titanium dioxide, ferric oxide, gelatin, and trace amounts of black edible ink.

Flomax Manufacturers

  • A-s Medication Solutions Llc
    Flomax (Tamsulosin Hydrochloride) Capsule [A-s Medication Solutions Llc]
  • Stat Rx Usa Llc
    Flomax (Tamsulosin Hydrochloride) Capsule [Stat Rx Usa Llc]
  • Lake Erie Medical Dba Quality Care Products
    Flomax Capsule [Lake Erie Medical Dba Quality Care Products]
  • Physicians Total Care, Inc.
    Flomax (Tamsulosin Hydrochloride) Capsule [Physicians Total Care, Inc.]
  • Remedyrepack Inc.
    Flomax Capsule [Remedyrepack Inc. ]
  • Cardinal Health
    Flomax (Tamsulosin Hydrochloride) Capsule [Cardinal Health]
  • Bryant Ranch Prepack
    Flomax (Tamsulosin Hydrochloride) Capsule [Bryant Ranch Prepack]
  • Boehringer Ingelheim Pharmaceuticals, Inc.
    Flomax (Tamsulosin Hydrochloride) Capsule [Boehringer Ingelheim Pharmaceuticals, Inc.]

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