What is the maximum recommended dose of udenafil (phosphodiesterase type 5 inhibitor)?

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Last updated: October 30, 2025View editorial policy

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Maximum Recommended Dose of Udenafil

The maximum recommended dose of udenafil for erectile dysfunction is 100 mg taken as needed, no more than once daily. 1, 2

Dosing Information

  • Udenafil is a selective phosphodiesterase type 5 inhibitor (PDE5i) used for the treatment of erectile dysfunction 3
  • Standard dosing options include:
    • 100 mg as needed (maximum dose for on-demand therapy) 1, 2
    • Lower doses (25-75 mg) may be appropriate for daily dosing regimens 4
  • Timing considerations:
    • Effective for up to 12 hours after dosing, providing flexibility for sexual activity 1
    • Has a time to maximum concentration of 1.0-1.5 hours and a terminal half-life of 11-13 hours 5

Efficacy and Safety

  • Clinical trials have demonstrated significant improvements in erectile function compared to placebo at both 100 mg and 200 mg doses 2
  • Most common adverse events are mild to moderate and include:
    • Facial flushing (most common) 2
    • Headache 2
    • Nasal congestion 3
    • Dyspepsia 3

Important Considerations and Contraindications

  • Like all PDE5 inhibitors, udenafil is absolutely contraindicated with nitrate medications due to risk of severe hypotension 3, 6
  • Sexual stimulation is necessary for the medication to be effective 3
  • Cardiovascular risk should be assessed before prescribing PDE5 inhibitors 6
  • Patients who cannot perform exercise equivalent to walking 1 mile in 20 minutes or climbing 2 flights of stairs in 20 seconds should be referred to a cardiologist before treatment 6

Special Populations

  • Use with caution in patients with mild to moderate hepatic or renal impairment, initially at lower doses 3
  • Consider lower starting doses in elderly patients, similar to other PDE5 inhibitors 7

Treatment Approach

  • Risk factor modification should be addressed alongside pharmacological treatment, including smoking cessation, weight loss, increasing physical activity, and avoiding excess alcohol consumption 6
  • An adequate trial of a PDE5i is defined as at least 5 separate occasions at the maximum dose before reporting it as ineffective 6
  • If udenafil fails, consider trying a different PDE5i before moving to second-line therapies 6

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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