Introduction: Tadalafil is a phosphodiesterase 5 (PDE5) inhibitor used for the treatment of erectile dysfunction (ED). The minimal time to onset of erectogenic effect in the at-home setting has not been evaluated.
Aim: The goal was to determine the earliest time to erectogenic effect leading to successful intercourse within 30 minutes after taking tadalafil 10 and 20 mg.
Methods: The multicenter, randomized, double-blind, placebo-controlled, parallel-group, phase-2 study enrolled men at least 21 years old with a minimum 3-month history of ED. Four single doses each of placebo, tadalafil 10 mg, or 20 mg were taken at home once every 8-10 days. Using a stopwatch, couples recorded in Sexual Encounter Profile diaries the earliest time within 30 minutes after dosing to the first erection adequate for vaginal penetration, and whether the erection led to successful intercourse.
Main Outcome Measures: The primary analysis compared the percentage of erections resulting in successful intercourse between tadalafil groups and placebo at one-minute intervals using a step-down procedure. A secondary analysis compared the overall distribution of time to erectogenic effect between treatment groups using the Cox Regression Method.
Results: Compared to placebo, a significant erectogenic response to tadalafil 20 mg was found from 30 minutes down to 16 minutes after dosing (P = 0.012). Response to tadalafil 10 mg approached significance (P = 0.054) at 30 minutes. As analysed by the Cox Regression Method, a significant erectogenic response was found from 30 minutes down to 15 minutes after dosing for tadalafil 20 mg (P = 0.020), and from 30 minutes down to 26 minutes for tadalafil 10 mg (P = 0.042). Fifty-two percent of men taking tadalafil 20 mg had at least one successful intercourse attempt within 30 minutes compared to 35.1% of men taking placebo (P = 0.038).
Conclusions: This stopwatch-based study demonstrated a pharmacodynamic effect within 30 minutes after dosing for tadalafil 10 and 20 mg.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/j.1743-6109.2004.04028.x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Effect of rapid and slow intravenous injection of sodium penicillin on arterial blood pressure in isoflurane-anesthetized horses during surgery.
Vet Anaesth Analg
January 2025
Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada.
Objective: To determine the effects of rapid (1 minute) and slow (10 minutes) intravenous (IV) injection of sodium penicillin on arterial blood pressure in anesthetized horses.
Study Design: Prospective randomized clinical trial.
Animals: A group of 29 client-owned horses of various breeds, 1-20 years old, with body masses of 360-710 kg.
Comparative Evaluation of Regain of Consciousness in Dexmedetomidine-Propofol versus Ketamine-Propofol in the Pediatric Cardiac Catheterization Procedure under Sedation using BIS Monitoring: A Randomized Prospective Study.
Ann Card Anaesth
January 2025
Department of Anaesthesia and Intensive Care, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
Background: Congenital heart diseases (CHDs) are not rare and often require an intervention at some point of time. Pediatric cardiac catheterization, a minimally invasive procedure, is performed to diagnose and to correct many cardiac abnormalities. Deep sedation with spontaneously breathing patients is the preferred technique for pediatric catheterization in the pediatric population.
View Article and Find Full Text PDFComparative Analysis of the Postoperative Analgesic Effect of Caudal Ropivacaine Versus Ropivacaine With Nalbuphine in Infra-Umbilical Pediatric Surgeries: A Randomized, Double-Blind Pilot Study.
Cureus
December 2024
Pediatric Surgery, All India Institute of Medical Sciences, Raipur, Raipur, IND.
Postoperative pain in children leads to an immense stress response than adults, leading to an increased hospital stay and "pain memory." Caudal epidural anesthesia is one of the most reliable, popular, and safe techniques that provide proper analgesia for infra-umbilical surgeries. A combination of local anesthetics and opioids reduces the dose-related adverse effects of each drug independently.
View Article and Find Full Text PDFShould digoxin immune fab be administered based solely on reported ingested amount in acute digoxin poisoning?
Am J Emerg Med
January 2025
Minnesota Regional Poison Center, Department of Pharmacy, Hennepin Healthcare, Minneapolis, MN, USA; Department of Family Medicine and Biobehavioral Health, University of Minnesota Medical School, Duluth Campus, Duluth, MN, USA. Electronic address:
Acute digoxin poisoning is increasingly uncommon in emergency medicine. Furthermore, controversy exists regarding indications for antidotal digoxin immune fab in acute poisoning. In healthy adults, the fab prescribing information recommends administration based on "known consumption of fatal doses of digoxin: ≥10mg," while many emergency medicine textbooks suggest fab administration be driven by clinical features or potassium concentration.
View Article and Find Full Text PDFMultiple Model Optimal Sampling Promotes Accurate Vancomycin Area-Under-the-Curve Estimation Using a Single Sample in Critically Ill Children.
Ther Drug Monit
January 2025
Children's Hospital Los Angeles, Los Angeles, California; and.
Background: Area-under-the-curve (AUC)-directed vancomycin therapy is recommended; however, AUC estimation in critically ill children is difficult owing to the need for multiple samples and lack of informative models.
Methods: The authors prospectively enrolled critically ill children receiving intravenous (IV) vancomycin for suspected infection and evaluated the accuracy of Bayesian estimation of AUC from a single, optimally timed sample. During the dosing interval, when clinical therapeutic drug monitoring was performed, an optimally timed sample was collected, which was determined for each subject using an established population pharmacokinetic model and the multiple model optimal function of Pmetrics, a nonparametric population pharmacokinetic modeling software.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!