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Related Concept Videos

Treatment for Pulmonary Arterial Hypertension: Phosphodiesterase Inhibitors01:28

Treatment for Pulmonary Arterial Hypertension: Phosphodiesterase Inhibitors

Phosphodiesterase 5 (PDE5) inhibitors are potent enzymes that function to hydrolyze cyclic nucleotides to their corresponding 5' monophosphates. Their unique biochemical properties have been applied in treating Pulmonary Arterial Hypertension (PAH).
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Effect of Hepatic Disease on Pharmacokinetics: Dose Adjustments Due to Hepatic Impairment

Hepatic impairment, characterized by decreased liver function, does not uniformly mandate adjustments in drug dosage. Whether dosage modifications are necessary depends on various factors related to the drug's metabolism and elimination pathways. If a drug is primarily excreted via the kidneys and bypasses significant hepatic processing, if it undergoes minimal metabolic transformation in the liver, or if it is volatile and primarily expelled through the lungs, dose adjustments may not be...
Male Sexual Response: Erection & Ejaculation01:17

Male Sexual Response: Erection & Ejaculation

Sexual stimulation can take various forms, such as physical touch and visual or auditory cues. When this happens, the parasympathetic reflex in the sacral portion of the spinal cord is activated. This reflex stimulates the release of nitric oxide (NO), which then dilates the arterioles in the penis, increasing blood flow to the erectile tissues - the corpora cavernosa and corpus spongiosum.
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Treatment for Pulmonary Arterial Hypertension: Endothelin Receptor Antagonists01:18

Treatment for Pulmonary Arterial Hypertension: Endothelin Receptor Antagonists

Endothelins (ETs) are potent vasoactive peptides critical in the human body's various physiological and pathological processes. One of the most promising therapeutic strategies for treating pulmonary arterial hypertension (PAH) involves counteracting the effects of these endothelins using a class of drugs known as endothelin receptor antagonists.
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A comparative evaluation of on-demand phosphodiesterase-5 inhibitor efficacy in erectile dysfunction treatment: a systematic review and network meta-analysis of double-blind, placebo-controlled, randomized trials.

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Updated: Jun 3, 2026

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility
04:22

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility

Published on: May 30, 2025

Combination therapy for erectile dysfunction: an update review.

Rohit R Dhir1, Hao-Cheng Lin, Steven E Canfield

  • 1Division of Urology, University of Texas Medical School at Houston, Houston, TX 77030, USA.

Asian Journal of Andrology
|March 23, 2011
PubMed
Summary
This summary is machine-generated.

Combination therapies show promise for erectile dysfunction (ED) patients unresponsive to phosphodiesterase-5 inhibitors (PDE5Is). Further research is needed to overcome study limitations and establish optimal treatment strategies for complex ED cases.

Related Experiment Videos

Last Updated: Jun 3, 2026

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility
04:22

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility

Published on: May 30, 2025

Area of Science:

  • Sexual Medicine
  • Urology

Background:

  • Oral phosphodiesterase-5 inhibitors (PDE5Is) are first-line therapy for erectile dysfunction (ED).
  • A significant number of patients with complex ED do not respond to PDE5I monotherapy.
  • Combination therapy is increasingly used for refractory ED, but lacks critical evaluation.

Purpose of the Study:

  • To critically evaluate the effectiveness of combination therapies for ED in patients non-responsive to PDE5I monotherapy.
  • To review existing literature on PDE5I-based combination treatments for complex ED.

Main Methods:

  • A comprehensive literature search of PubMed and Cochrane Library was performed.
  • Articles published between January 1990 and December 2010 were reviewed, including reviews, RCTs, cohort, and retrospective studies.
  • References from retrieved articles were manually scanned for additional relevant publications.

Main Results:

  • Various combination therapies were identified, including PDE5I with vacuum erectile devices (VED), intraurenal medication, intracavernosal injection (ICI), androgen supplements, and alpha-blockers.
  • Some combination treatments demonstrated effectiveness in preliminary studies.
  • The majority of studies had limitations, such as small sample sizes and study biases.

Conclusions:

  • Combination therapies offer potential for managing complex ED cases refractory to PDE5Is.
  • Current research provides a foundation for future studies, but methodological improvements are necessary.
  • Further high-quality research is required to establish evidence-based guidelines for combination therapy in ED.