Clinical trial Recruiting at 1 site Phase 2 Interventional Ages 50 to 74 Men only

Evaluating Tryptophan for Treating BPH Symptoms

Official title: TryptoBPH - Proof-of-concept Study to Evaluate the Safety and Efficacy of Tryptophan in Patients with BPH

Run by Clinical Academic Center (2CA-Braga) · NCT05401032 · Data updated 2026-11-12

This study is testing whether Tryptophan can help men with BPH symptoms feel better without the sexual side effects that come with usual treatments.

Quick facts

PhasePhase 2
Study typeInterventional
Ages50 Years to 74 Years
SexMen only
Enrollment70 (estimated)
SponsorClinical Academic Center (2CA-Braga)
Academic / other
Locations1 site (Braga)
StatusRecruiting
StartedDecember 20, 2024
Main results expectedDecember 31, 2026
Study endsDecember 31, 2026
Registry record updatedJanuary 6, 2025
Trial IDNCT05401032 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are men aged 50 to 75 with diagnosed BPH and LUTS who are eligible for Tamsulosin treatment.

Probably not a fit

Patients with severe urinary retention, active urinary tract infections, or a history of prostate cancer may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial aims to assess the safety and efficacy of Tryptophan (5-HTP) in men with benign prostatic hyperplasia (BPH) and associated lower urinary tract symptoms (LUTS). The study will randomly assign eligible participants to receive either Tamsulosin or 5-HTP to compare their effects on symptom relief. The trial is designed to explore a novel pharmacological approach that may improve symptoms without the sexual side effects commonly associated with current BPH treatments. Conducted at the Hospital de Braga, this single-center trial will provide insights into alternative therapies for BPH.

Why it matters

Potential benefit: If successful, this study could offer a new treatment option for men suffering from BPH that minimizes side effects.

How similar studies have gone: While the use of Tryptophan for BPH is a novel approach, similar studies exploring alternative treatments for LUTS have shown promise.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Written informed consent;
* Male patients with BPH for which tamsulosin is the therapeutic option per SoC;
* Aged ≥50 and less than 75 years old;
* With prostate volume ≥30 cm3 by TRUS;
* Diagnosed with LUTS defined by a stable IPSS total score ≥13 points.

Exclusion Criteria:

* Patients with post-void bladder residual volume ≥250 ml;
* Patients with intravesical obstruction from any cause other than BPH;
* History of any procedure considered an intervention for BPH;
* Patients with active urinary tract infection;
* History of recurrent urinary tract infections;
* Current prostatitis or diagnosis of chronic prostatitis;
* History of prostate or invasive bladder cancer;
* Use of 5 α-reductase inhibitors within 6 months;
* Phytotherapy within 2 weeks before entry;
* Use of serotonin reuptake inhibitors or monoamine oxidase inhibitors;
* Patients with acute or chronic kidney failure;
* Patients with diagnosed or suspicion of intolerance to lactose;
* Patients submitted to general anesthesia in the past 4 weeks;
* Known intellectual disability that may hampers giving informed consent and would make the patient inappropriate for entry into this study, in the judgment of the investigator.

Where it's running

  • Clinical Academic Center - Braga, Association (2CA-Braga)
    Braga, Portugal
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.