How should I monitor a patient on long-term treatment for BPH to assess efficacy and side effects?

Guideline-aligned answer with reasoning, red flags and references. Clinically reviewed by Dr Kola Tytler MBBS CertHE MBA MRCGP.

Posted: 14 August 2025Updated: 14 August 2025 Guideline-Aligned (High Confidence) Clinically Reviewed
Dr Kola Tytler MBBS CertHE MBA MRCGPClinical Lead • iatroX

To monitor a patient on long-term treatment for benign prostatic hyperplasia (BPH) to assess treatment efficacy and side effects, regular reviews are essential ,.

  • General Monitoring Principles:
    • During reviews, you should re-assess the patient's symptoms and quality of life, for example, by using the International Prostate Symptom Score (IPSS) questionnaire .
    • It is also crucial to assess for any adverse effects of the treatment ,.
  • Specific Review Schedules by Drug Type:
    • Alpha-blockers: Review men taking alpha-blockers at 4 to 6 weeks initially, and then every 6 to 12 months ,. While generally well-tolerated, potential side effects can include orthostatic hypotension, dizziness, fatigue or weakness, and rhinitis .
    • 5-alpha reductase inhibitors (5-ARIs): Review men taking 5-alpha reductase inhibitors at 3 to 6 months initially, and then every 6 to 12 months ,. Common side effects associated with 5-ARIs include decreased libido, erectile dysfunction, and breast enlargement .
    • Antimuscarinic drugs: Review men taking antimuscarinics every 4 to 6 weeks until their symptoms are stable, and then every 6 to 12 months ,. During these reviews, re-assess symptoms, quality of life, adverse effects, and the ongoing need for treatment .
    • Combination Therapy: Men on combination treatment with an alpha-blocker and a 5-alpha reductase inhibitor are more likely to experience adverse effects such as decreased libido, ejaculatory abnormalities, and erectile dysfunction compared to alpha-blocker monotherapy .
  • When Treatment Fails:
    • If drug treatment fails to be effective or is not tolerated, consider offering an alternative drug .
    • If treatment ultimately fails, the man should be referred for specialist urological assessment and management ,.

Educational content only. Always verify information and use clinical judgement.