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Dutasteride with tamsulosin hydrochloride capsules


Oral formulation containing dutasteride and tamsulosin hydrochloride.

Drugs List

  • COMBODART capsules
  • dutasteride 0.5mg and tamsulosin 0.4mg capsules
  • DUTROZEN 0.5mg+0.4mg capsules
  • Therapeutic Indications


    Benign prostatic hyperplasia

    Treatment of moderate to severe symptoms of benign prostatic hyperplasia (BPH).

    Risk reduction of acute urinary retention (AUR) and surgery in patients with moderate to severe symptoms of BPH.



    One capsule taken 30 minutes after the same meal each day.


    Children under 18 years
    Micturition syncope
    History of postural hypotension
    Peri-operative period in ocular surgery
    Severe hepatic impairment

    Precautions and Warnings

    Mild hepatic impairment
    Renal impairment - creatinine clearance below 10ml/minute

    Advise hypotension/syncope may affect ability to drive/operate machinery
    Contains propylene glycol: may cause irritation
    Contains soya or soya derivative
    Capsule contents may cause irritation of the oropharyngeal mucosa
    Absorbed by skin - avoid contact with leaking capsules
    Establish new PSA baseline at 6 months and monitor PSA regularly thereafter
    Investigate any sustained increase in PSA during treatment
    Regular examination of prostate advised to exclude prostatic cancer
    Advise patient to report any breast changes e.g. lumps, pain or discharge
    Advise patient to sit or lie down at first signs of orthostatic hypotension
    Intraoperative Floppy Iris Syndrome has been reported in cataract surgery
    Intraoperative Floppy Iris Syndrome has been reported in glaucoma surgery
    Discontinue 1 to 2 weeks prior to cataract surgery
    Discontinue if angioedema occurs
    Advise patient grapefruit products may increase plasma level
    May reduce sperm count, function, motility or seminal fluid volume
    Male: Use of condoms advised if partner pregnant or may become pregnant

    Dutasteride causes a decrease (of approximately 50%) in serum prostate-specific antigen (PSA) levels after 6 months of treatment. Increase from the lowest PSA level whilst on dutasteride with tamsulosin may indicate presence of prostate cancer or non-compliance to therapy, which should be evaluated. Previous PSA values should be sought for comparison when interpreting the PSA value for a patient.

    During the pre-operative assessment prior to cataract surgery, surgeons must ascertain whether the patients have ever received tamsulosin. If they have, appropriate measures should be in place to manage any occurrence of Intraoperative Floppy Iris Syndrome (IFIS) during the procedure.

    Breast cancer has been reported in men taking dutasteride in clinical trials and during the post-marketing period. Physicians should instruct their patients to promptly report any changes in their breast tissue such as lumps or nipple discharge. Currently it is not clear if there is a causal relationship between the occurrence of male breast cancer and long term use of dutasteride.

    Incidence of cardiac failure was higher among subjects taking the combinations of dutasteride and an alpha blocker, primarily tamsulosin, than it was among subjects not taking the combination.

    Pregnancy and Lactation


    Not indicated for use in women.

    Dutasteride inhibits the conversion of testosterone to dihydrotestosterone and may, if administered to a women carrying a male foetus, inhibits the development of the external genitalia of the foetus.

    Small amounts of dutasteride have been found in the semen of men undergoing treatment. Animal studies have shown that it is unlikely to have any adverse effect on a male foetus if the mother is exposed to the semen of a man undergoing treatment with dutasteride (the greatest risk is within the first 16 weeks of pregnancy). However, it is recommended that a condom is used in order to avoid exposure to pregnant or potentially pregnant women.

    Animal studies showed no evidence of foetal harm after administration of tamsulosin.


    Not indicated for use in women.

    It is not known whether dutasteride or tamsulosin is excreted in human milk.


    Advise patient that dutasteride is absorbed through the skin and that women and children must avoid contact with leaking capsules. If contact is made with leaking capsules, the contact area should be washed immediately with soap and water.

    Advise patients capsules should be swallowed whole and not chewed or opened as contact with the capsule contents may result in irritation of the oropharyngeal mucosa.

    Advise patient grapefruit products may increase plasma level of dutasteride.

    Advise patients to report any changes in their breast tissue such as lumps or nipple discharge.

    If the patient's partner is or may potentially be pregnant, it is recommended that the patient avoids exposure of his partner to semen by use of a condom.

    Side Effects

    Abnormal ejaculation
    Allergic reaction
    Breast enlargement
    Breast tenderness
    Cardiac failure
    Ejaculation disorders
    Increased risk of breast cancer
    Intraoperative floppy iris syndrome
    Postural hypotension
    Reduced libido
    Reduction in sperm count and volume
    Stevens-Johnson syndrome


    It is strongly recommended that the UK National Poisons Information Service be consulted on cases of suspected or actual overdose where there is doubt over the degree of risk or about appropriate management.

    The following number will direct the caller to the relevant local centre (0844) 892 0111

    Information may be obtained if you have access to ToxBase the primary clinical toxicology database of the National Poisons Information Service. This is available via password on the internet ( ) or if this is unavailable at the backup site ( ).

    Further Information

    Last Full Review Date: June 2020

    Reference Sources

    Summary of Product Characteristics: Combodart 0.5mg/0.4mg capsules. GlaxoSmithKline UK Ltd. Revised March 2020.

    Summary of Product Characteristics: Dutrozen 0.5mg/0.4mg capsules. Zentiva Pharma UK Ltd. Revised February 2020.

    NICE Evidence Services Available at: Last accessed: 15 June 2020

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    Medscape UK | Univadis prescription drug monographs & interactions are based on FDB Multilex Content

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    FDB Disclaimer : FDB Multilex is intended for the use of healthcare professionals and is provided on the basis that the healthcare professionals will retain FULL and SOLE responsibility for deciding what treatment to prescribe or dispense for any particular patient or circumstance.