Tanyz 0.4 mg modified-release capsules – tamsulosin for urinary symptoms of an enlarged prostate

Tanyz 0.4 mg are modified-release hard capsules containing tamsulosin (as tamsulosin hydrochloride). Tamsulosin belongs to the group of alpha-1A and alpha-1D adrenoceptor blockers (urological medicines, ATC G04CA02).

The medicine relaxes the smooth muscle of the prostate and the urethra, so urine passes more easily and urination becomes easier; it also reduces the urge to urinate frequently. It is used in men with urinary symptoms caused by benign enlargement of the prostate (benign prostatic hyperplasia – BPH).

What is Tanyz 0.4 mg used for and how should it be taken correctly?

Basic information about the medicine

What is Tanyz used for?

According to the package leaflet, Tanyz is used in men to treat lower urinary tract symptoms caused by benign enlargement of the prostate (BPH). These include:

• difficulty passing urine and difficulty starting urination,
• a weak or interrupted urine stream,
• an urgent or frequent need to urinate during the day,
• frequent urination at night.

The medicine relieves the symptoms but does not shrink the prostate itself; regular medical check-ups are therefore needed to monitor your condition.

How is Tanyz taken and dosed?

• The recommended dose is 1 capsule a day, after breakfast or after the first meal of the day.
• Swallow the capsule whole with enough water – do not open, crush or chew it, because the medicine is designed to be released gradually.
• Tanyz is prescribed for long-term use; its effects on urination are maintained during long-term treatment.
• Do not change the dose or stop treatment without talking to your doctor.

Special patient groups

• Children and adolescents under 18 years: the medicine is not used because it is not intended for this population.
• Kidney impairment: according to the summary of product characteristics no dose adjustment is needed, but always tell your doctor if you have kidney disease.
• Liver impairment: no dose adjustment is needed in mild or moderate liver insufficiency; in severe liver insufficiency the medicine must not be taken.
• Women: the medicine is not intended for use in women.

Contraindications – when the medicine must not be used

Do not take Tanyz:

• if you are allergic to tamsulosin hydrochloride or to any of the excipients (an allergy may show as sudden swelling of the throat or tongue, difficulty breathing, itching and rash – angioedema);
• if you have ever felt dizzy or fainted because of low blood pressure when standing up (orthostatic hypotension);
• if you have severe liver insufficiency.

Precautions and warnings

• Regular medical check-ups are needed to monitor the condition you are being treated for.
• Like other medicines in this group, Tanyz may rarely cause fainting; if you feel dizzy or weak, sit or lie down until the symptoms pass.
• If you have kidney disease, always tell your doctor.
• Before eye surgery for cataract (cloudy lens) or glaucoma (raised eye pressure), tell your eye specialist that you are taking, have taken or plan to take Tanyz – the medicine can cause complications during the operation (floppy iris syndrome). Ask your doctor whether treatment should be paused.

Interactions with other medicines, food and drink

Tell your doctor or pharmacist about all medicines you are taking. According to the package leaflet:

• taking it together with other alpha-1 adrenoceptor blockers may lower blood pressure and cause dizziness or fainting;
• diclofenac and warfarin may speed up the elimination of tamsulosin and shorten its effect;
• ketoconazole, itraconazole (antifungals) and erythromycin (an antibiotic) may slow down the elimination of tamsulosin and increase its effect;
• take Tanyz after breakfast or after the first meal of the day.

Pregnancy and breastfeeding

Tanyz is not intended for use in women. In men, ejaculation disorders have been reported: semen goes back into the bladder instead of leaving through the urethra (retrograde ejaculation), the volume of ejaculate is reduced, or ejaculation is absent. According to the leaflet, this effect is not harmful.

Driving and using machines

There is no evidence that tamsulosin affects the ability to drive or use machines, but the medicine may cause dizziness. If this happens, do not carry out activities that require attention.

Possible side effects

• Common (up to 1 in 10 patients): dizziness, especially when standing up; ejaculation disorder (retrograde ejaculation, reduced volume or absence of ejaculate).
• Uncommon (up to 1 in 100): headache, palpitations, drop in blood pressure on standing up quickly (sometimes with fainting), runny or blocked nose (rhinitis), constipation, diarrhoea, nausea, vomiting, weakness, rash, itching, hives.
• Rare (up to 1 in 1,000): loss of consciousness (fainting); angioedema – sudden swelling of the throat or tongue with difficulty breathing.
• Very rare (up to 1 in 10,000): painful, prolonged erection requiring treatment (priapism); Stevens-Johnson syndrome.
• Not known: blurred vision and visual problems, nosebleed, serious skin rash (erythema multiforme, exfoliative dermatitis), dry mouth, irregular heartbeat (atrial fibrillation, arrhythmia, tachycardia), difficulty breathing, floppy iris syndrome during cataract or glaucoma surgery.

Overdose, missed dose and stopping treatment

• Overdose: blood pressure may drop and the heart may beat faster, with dizziness and weakness – contact your doctor or pharmacist immediately.
• Missed dose: if you forgot the capsule after breakfast, you can take it later the same day. If you only remember the next day, do not take a double dose.
• Stopping treatment: if you stop too early, the original symptoms may return – use the medicine for as long as your doctor has prescribed.

Related information

For additional care and support with enlarged prostate symptoms, see also the Preparations for an enlarged prostate and urination problems category – products in this category do not replace the medicine you have been prescribed.

Composition, pack and manufacturer

• Active substance: tamsulosin hydrochloride 0.4 mg per modified-release capsule.
• Capsule contents (pellets): triethyl citrate; talc; methacrylic acid – ethyl acrylate copolymer 1:1 dispersion 30% (contains sodium lauryl sulfate and polysorbate 80); microcrystalline cellulose.
• Capsule shell: yellow, black and red iron oxide (E172); titanium dioxide (E171); gelatin; indigo carmine (E132).
• Appearance: two-piece hard gelatin capsules with an orange body and an olive-green cap, filled with white to almost white pellets.
• Pack: carton with 3 blisters of 10 capsules (30 capsules).
• Marketing authorisation holder: KRKA-FARMA d.o.o. Belgrade; manufacturer: KRKA, d.d., Novo Mesto, Slovenia. Authorisation number: 515-01-03437-20-001 of 19 April 2021.

Storage

• Keep out of the sight and reach of children.
• This medicine does not require any special storage conditions; store in the original package.
• Do not use after the expiry date stated on the pack (shelf life: 3 years).
• Return unused medicines to a pharmacy that collects unused medicines from the public.

Frequently asked questions

When is the best time to take Tanyz?

According to the leaflet, take one capsule a day after breakfast or after the first meal of the day, at about the same time every day.

May I open the capsule if I have trouble swallowing?

No. The capsule is swallowed whole, without opening, crushing or chewing, because it contains modified-release pellets. If you cannot swallow the capsule, ask your doctor or pharmacist for advice.

Why do I feel dizzy when I stand up quickly?

Tamsulosin can lower blood pressure when you change body position (a common and uncommon side effect). Stand up slowly; if dizziness persists or you faint, contact your doctor.

Does Tanyz affect ejaculation?

It can. Common side effects are retrograde ejaculation, reduced volume or absence of ejaculate. According to the leaflet, this is not harmful, but you can discuss it with your doctor.

Sources

• ALIMS – Patient information leaflet Tanyz 0,4 mg (PIL)
• ALIMS – Summary of product characteristics Tanyz 0,4 mg (SmPC)

Sources checked on: 25 October 2026.