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Drugs for genitourinary disorders
Prostatic hyperplasia
Tamsul
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Tamsul
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Composition: Each modified-release capsule contains 0.4mg Tamsulosin hydrochloride.
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Properties: -   Tamsulosin selectively blocks alpha-1 adreno-receptors (alpha1A-adrenoreceptor subtype) in the prostate, resulting in relaxation of prostatic and urethral smooth muscles. It is more selective than Prazosin. -   Tamsul® increases the maximum urinary flow rate. It relieves obstruction by relaxing smooth muscle in prostate and urethra. -   Pharmacokinetics -   Tamsulosin is rapidly absorbed from the intestine and is almost completely bioavailable. The extent and rate of absorption are reduced by food. It peaks in plasma after 6 hours. Tamsulosin is about 99% bound to plasma proteins. -   Tamsulosin is metabolized slowly in the liver primarily by Cytochrome P450 isoenzymes CYP2D6 and CYP3A4. None of the metabolites are more active than Tamsulosin itself. -   Tamsulosin and its metabolites are mainly excreted through urine, with elimination half-life of 10-13 hours.
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Indications: -Â Â Treatment of urinary obstruction symptoms produced by benign prostatic hyperplasia. Â Â
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Contra-Indictions: -Â Â Â Hypersensitivity to Tamsulosin hydrochloride. -Â Â Â History of Postural hypotension. -Â Â Â Severe hepatic insufficiency.
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Adverse Effects:-Â Â Â Dizziness, headache, asthenia, postural hypotension and palpitations may rarely occur. -Â Â Â Postural hypotension may be exaggerated by exercise, heat or alcohol ingestion. -Â Â Â Because Tamsulosin is more selective on prostate than Prazosin, it shows less dilator effect (postural hypotension) than that seen with Prazosin. -Â Â Â So rarely, abnormal ejaculation may also occur.
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Dosage & Administration: +Â Â Â One capsule 0.4mg daily, to be taken after breakfast. +Â Â Â The dose may be increased, if necessary, after 2-4 weeks, to 0.8 mg daily.
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How supplied: Strip contains 10 modified-release capsules in packs of one strip.
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