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Benign Prostatic HyperplasiaPhase 4DTT-BPHNCT07715448

Effect of Different Dosing Regimens of Tadalafil or Tamsulosin Combined With 5α-Reductase Inhibitors on Urinary and Sexual Outcomes in Benign Prostatic Hyperplasia

A Phase 4 study testing Tamsulosin, Tadalafil and 5-Alpha Reductase Inhibitor in people with Benign Prostatic Hyperplasia and Lower Urinary Tract Symptoms, run by Beni-Suef University at 1 site in Egypt.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

Benign prostatic hyperplasia (BPH) is a common condition among aging men that causes lower urinary tract symptoms (LUTS) and may negatively affect sexual function. This randomized single-blind controlled clinical trial compares the efficacy, safety, and sexual outcomes of different dosing regimens of tadalafil or… Read more about this study

Who is it for?
Ages 50 years and older, men only
What is being tested?
Tamsulosin, Tadalafil and 5-Alpha Reductase Inhibitor
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
240 participants
Where
1 siteEgypt
Study dates
Start not givento 1 Jan 2026
Phase
Phase 4
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 50 years and older
  • Men only
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Male participants aged 50 years or older.
  • Newly diagnosed with benign prostatic hyperplasia (BPH).
  • Moderate to severe lower urinary tract symptoms (LUTS), defined as International Prostate Symptom Score (IPSS) > 7.
  • Prostate volume >40 mL confirmed by transrectal ultrasonography (TRUS).
  • Sexually active with a baseline International Index of Erectile Function-Erectile Function (IIEF-EF) score >10.
  • Prostate-specific antigen (PSA) <4 ng/mL and no suspicious findings on digital rectal examination (DRE).
  • Able and willing to provide written informed consent.

Who cannot join

  • History of prostate cancer.
  • Previous prostate surgery.
  • Abnormal digital rectal examination suggestive of malignancy.
  • Severe erectile dysfunction (IIEF-EF score ≤10).
  • Uncontrolled diabetes mellitus.
  • Uncontrolled cardiovascular disease.
Show all 15Show fewer
  • Neurological disorders affecting bladder function.
  • Renal impairment.
  • Hepatic impairment.
  • Active urinary tract infection.
  • Bladder stones or other significant urological pathology.
  • Known hypersensitivity to tamsulosin, tadalafil, or 5-alpha reductase inhibitors.
  • Patients actively seeking fertility treatment.
  • Current use of medications known to significantly affect sexual function.
  • Concurrent use of nitrates or contraindicated antihypertensive medications.

Trial locations and contacts

1 site in 1 country.

Egypt1 site
  • Beni-Suef University Hospital

    Banī Suwayf, Beni Suef Governorate

Other trials in Egypt

About this study

Official title: "Effect of Different Dosing Regimens of Tadalafil or Tamsulosin Combined With 5α-Reductase Inhibitors on Urinary and Sexual Outcomes in Benign Prostatic Hyperplasia: A Comparative Clinical Trial Study"

Benign prostatic hyperplasia (BPH) is a common condition among aging men that causes lower urinary tract symptoms (LUTS) and may negatively affect sexual function. This randomized single-blind controlled clinical trial compares the efficacy, safety, and sexual outcomes of different dosing regimens of tadalafil or tamsulosin combined with 5-alpha reductase inhibitors (5ARIs) in men with BPH and enlarged prostate volume. A total of 240 participants were randomly assigned to six treatment groups and followed for 12 weeks. Changes in urinary symptoms, erectile function, ejaculatory function, prostate volume, prostate-specific antigen (PSA), urinary flow rate, post-void residual volume, and adverse events were evaluated to determine the optimal combination regimen.

Read the detailed description

Benign prostatic hyperplasia (BPH) is one of the most common causes of lower urinary tract symptoms (LUTS) in older men and is frequently associated with impaired sexual function. Alpha-blockers and 5-alpha reductase inhibitors (5ARIs) are widely used for medical management; however, both treatment strategies may adversely affect sexual function. Phosphodiesterase type-5 inhibitors, particularly tadalafil, have emerged as an alternative therapeutic option because they improve LUTS while preserving erectile function.

This randomized, single-blind, controlled clinical trial was conducted at the Department of Urology, Faculty of Medicine, Beni-Suef University, Egypt. The study enrolled 240 eligible men aged 50 years or older with moderate-to-severe LUTS secondary to BPH and prostate volume greater than 40 mL. Participants were randomly allocated into six equal treatment groups comparing different dosing regimens of tadalafil or tamsulosin combined with 5-alpha reductase inhibitors.

The primary objective was to compare improvements in lower urinary tract symptoms using the International Prostate Symptom Score (IPSS). Secondary objectives included evaluation of erectile function using the International Index of Erectile Function-Erectile Function domain (IIEF-EF), ejaculatory function using the Male Sexual Health Questionnaire-Ejaculatory Dysfunction (MSHQ-EjD), maximum urinary flow rate (Qmax), prostate volume, prostate-specific antigen (PSA), post-void residual urine volume (PVR), and treatment-related adverse events.

Participants received treatment for 12 weeks and were assessed at baseline and at the end of the study. Safety was evaluated by monitoring adverse events throughout the study. The findings are expected to identify the most effective and well-tolerated combination regimen for improving both urinary and sexual outcomes in men with benign prostatic hyperplasia.

Being tested
Tamsulosin, Tadalafil, 5-Alpha Reductase Inhibitor
Keywords
Benign Prostatic Hyperplasia, BPH, Lower Urinary Tract Symptoms, LUTS, Tadalafil, Tamsulosin, 5-Alpha Reductase Inhibitors, 5ARI, Finasteride, Dutasteride, Phosphodiesterase-5 Inhibitors, PDE5 Inhibitors, Erectile Function, Ejaculatory Dysfunction, IPSS, Randomized Controlled Trial, Urology
Medical subject headings
Prostatic Hyperplasia, Lower Urinary Tract Symptoms, Erectile Dysfunction, Ejaculatory Dysfunction

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • TamsulosinDrug

    Tamsulosin hydrochloride 0.4 mg administered orally either once daily or every other day according to the randomized treatment allocation for 12 weeks.

  • TadalafilDrug

    Tadalafil 5 mg administered orally either once daily or every other day according to the randomized treatment allocation for 12 weeks.

  • 5-Alpha Reductase InhibitorDrug

    A 5-alpha reductase inhibitor (finasteride 5 mg or dutasteride 0.5 mg according to routine clinical practice) administered either once daily or every other day according to the randomized treatment allocation for 12 weeks.

Study groups in NCT07715448
Study groupRoleWhat they receive
Tamsulosin daily + 5ARI dailyExperimentalParticipants received tamsulosin 0.4 mg once daily in combination with a 5-alpha reductase inhibitor administered once daily for 12 weeks.
Receives: Drug: Tamsulosin; Drug: 5-Alpha Reductase Inhibitor
Tamsulosin daily + 5ARI every other dayExperimentalParticipants received tamsulosin 0.4 mg once daily combined with a 5-alpha reductase inhibitor administered every other day for 12 weeks.
Receives: Drug: Tamsulosin; Drug: 5-Alpha Reductase Inhibitor
Tamsulosin every other day + 5ARI every other dayExperimentalParticipants received tamsulosin 0.4 mg every other day combined with a 5-alpha reductase inhibitor administered every other day for 12 weeks.
Receives: Drug: Tamsulosin; Drug: 5-Alpha Reductase Inhibitor
Tadalafil daily + 5ARI dailyExperimentalParticipants received tadalafil 5 mg once daily in combination with a 5-alpha reductase inhibitor administered once daily for 12 weeks.
Receives: Drug: Tadalafil; Drug: 5-Alpha Reductase Inhibitor
Tadalafil daily + 5ARI every other dayExperimentalParticipants received tadalafil 5 mg once daily combined with a 5-alpha reductase inhibitor administered every other day for 12 weeks.
Receives: Drug: Tadalafil; Drug: 5-Alpha Reductase Inhibitor
Tadalafil every other day + 5ARI every other dayExperimentalParticipants received tadalafil 5 mg every other day combined with a 5-alpha reductase inhibitor administered every other day for 12 weeks.
Receives: Drug: Tadalafil; Drug: 5-Alpha Reductase Inhibitor

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change in Lower Urinary Tract Symptoms (IPSS)

    Change in the International Prostate Symptom Score (IPSS) from baseline to Week 12. Higher scores indicate more severe symptoms; a reduction in score reflects clinical improvement.

    Measured: Baseline and Week 12

Secondary outcomes (7)
  1. Change in Erectile Function

    Change in the International Index of Erectile Function-Erectile Function domain (IIEF-EF) score from baseline to Week 12. Higher scores indicate better erectile function.

    Measured: Baseline and Week 12

  2. Change in Ejaculatory Function

    Change in the Male Sexual Health Questionnaire-Ejaculatory Dysfunction (MSHQ-EjD) score from baseline to Week 12.

    Measured: Baseline and Week 12

  3. Change in Maximum Urinary Flow Rate (Qmax)

    Change in maximum urinary flow rate measured by uroflowmetry from baseline to Week 12.

    Measured: Baseline and Week 12

  4. Change in Prostate Volume

    Change in prostate volume measured by transrectal ultrasonography (TRUS) from baseline to Week 12.

    Measured: Baseline and Week 12

  5. Change in Prostate-Specific Antigen (PSA)

    Change in serum prostate-specific antigen (PSA) level from baseline to Week 12.

    Measured: Baseline and Week 12

  6. Change in Post-Void Residual Volume (PVR)

    Change in post-void residual urine volume measured by bladder ultrasound from baseline to Week 12.

    Measured: Baseline and Week 12

  7. Incidence of Treatment-Related Adverse Events

    Frequency and type of treatment-emergent adverse events, including dizziness, orthostatic hypotension, headache, flushing, dyspepsia, gynecomastia, decreased libido, erectile dysfunction, and ejaculatory dysfunction.

    Measured: Throughout the 12-week treatment period

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted20 Jul 2026
  2. Primary completion1 Jan 2026
  3. Study completion1 Jan 2026

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Model description
Participants were randomly assigned in a 1:1:1:1:1:1 ratio into six parallel treatment groups to compare different dosing regimens of tadalafil or tamsulosin combined with 5-alpha reductase inhibitors. Each participant received only one assigned treatment regimen throughout the 12-week study period.
Masking
Single blind
Who is masked
Outcomes assessor
Enrolment
240 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07715448
Sponsor's protocol ID
FMBSUREC/07092025/Taha
Acronym
DTT-BPH
Status last verified
Jul 2026
First submitted
15 Jul 2026
Last updated
20 Jul 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Publications

  • Gacci M, Ficarra V, Sebastianelli A, Corona G, Serni S, Shariat SF, Maggi M, Zattoni F, Carini M, Novara G. Impact of medical treatments for male lower urinary tract symptoms due to benign prostatic hyperplasia on ejaculatory function: a systematic review and meta-analysis. J Sex Med. 2014 Jun;11(6):1554-66. doi: 10.1111/jsm.12525. Epub 2014 Apr 7.

    PubMed 24708055
  • Lepor H. Alpha blockers for the treatment of benign prostatic hyperplasia. Rev Urol. 2007 Fall;9(4):181-90.

    PubMed 18231614
  • Giuliano F, Uckert S, Maggi M, Birder L, Kissel J, Viktrup L. The mechanism of action of phosphodiesterase type 5 inhibitors in the treatment of lower urinary tract symptoms related to benign prostatic hyperplasia. Eur Urol. 2013 Mar;63(3):506-16. doi: 10.1016/j.eururo.2012.09.006. Epub 2012 Sep 11.

    PubMed 23018163

Questions about this trial

What is this clinical trial studying?

A Phase 4 study testing Tamsulosin, Tadalafil and 5-Alpha Reductase Inhibitor in people with Benign Prostatic Hyperplasia and Lower Urinary Tract Symptoms, run by Beni-Suef University at 1 site in Egypt.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 7 inclusion and 15 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 20 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Egypt. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change in Lower Urinary Tract Symptoms (IPSS) (time frame: Baseline and Week 12). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT07715448, which also lists 3 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Jul 2026.

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