Tamsulosin Hydrochloride (Generic), slide 1 of 1

Tamsulosin Hydrochloride (Generic) Capsules, 0.4-mg, 1 capsule

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Tamsulosin is used in men to treat the symptoms benign prostatic hyperplasia (BPH) which can cause excess difficulties with urination (pain and frequency). By relaxing muscles in the bladder and prostate, urine may flow more easily. This drug is sometimes prescribed by veterinarians for use in companion animals.

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Tamsulosin hydrochloride capsules USP are an alpha adrenoceptor antagonist that can be used for ureteral relaxation to facilitate passage of urinary calculi.

Possible Side Effects

Possible side effects include skin rash, urticaria, pruritus, angioedema, and respiratory symptoms.

Drug & Food Interactions

The following drug interactions have either been reported or are theoretical in humans or animals receiving tamsulosin and may be of significance in veterinary patients: Adrenergic blockers, beta blockers, cimetidine, clarithromycin, ketoconazole, sildenafil, terbinafine, warfarin.


Tamsulosin is contraindicated in patients known to be hypersensitive to it. Tamsulosin capsules are manufactured in a sustained-release (beads) presentation to avoid rapid absorption and associated hypotensive effects; therefore they should not be crushed or compounded into an oral suspension.

This drug is FDA-approved for human use. However, it is common practice for veterinarians to prescribe such drugs for use in dogs and cats.

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  1. Prescribing Information

See all items by Tamsulosin Hydrochloride

  • Item Number
  • Generic Name
  • Common Brand Name(s)
  • For Use With
    Dogs & Cats
  • Administration Form
  • Product Form
  • Health Condition
  • Drug Type
    Adrenergic Agent, Diuretic

Active Ingredients: Tamsulosin Hydrochloride 0.4-mg. Inactive Ingredients: Microcrystalline Cellulose, Water, Talc, Triethyl Citrate, Ferrosoferric Oxide, FD&C Blue NO. 2, Ferric Oxide Red, Titanium Dioxide, Gelatin Unspecified, Ferric Oxide Yellow, Alcohol, Isopropyl Alcohol, Butyl Alcohol, Propylene Glycol, Potassium Hydroxide, Shellac.

Recommended Dosage

Please use according to your veterinarian's instructions. 

Storage Instructions

Store at 77°F. Excursions permitted to 59° - 86°F.


What is Tamsulosin Hydrochloride?

Tamsulosin is an Alpha-1 antagonist that causes selective blockade of smooth muscle in the ureters, uretha, and prostate. Tamsulosin is typically prescribed by veterinarians as a ureteral/urethral

How is this medication given?

This medication is given by mouth (orally). Give on an empty stomach for best results. Do not crush or allow animal to chew beads found inside capsule.

How long until I notice results in my pets?

Tamsulosin may take up to 3 days for the drug to work at its peak effect.

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