Bioequivalence and Bioavailability of an Orodispersible Tablet of Sildenafil Citrate in Healthy Chinese Male Subjects

Count of cases of disease progression

Condition	Risk Factors	Recommendations
Nitrate use	Severe hypotension	Do not combine with nitrates
Severe Cardiovascular Disease	Increased risk of heart attack or stroke	Medical consultation before use
Retinal Disorders	Potential for vision problems	Caution advised
Severe Liver Impairment	Reduced drug metabolism	Dose adjustment or avoid

as the first event of clinical worsening. c.

• Sildenafil use should be disclosed to your healthcare provider.
• Not suitable for men with severe cardiovascular conditions.
• Ask about possible drug interactions before starting.
• Adjustments may be needed for older adults.
• Timing of medication is important for maximum effect.
• Monitoring for side effects helps prevent complications.
• Stop using sildenafil if health issues arise.
• Always follow professional medical advice.

Count of non-elective hospital stays for worsening

6.2 Postmarketing Experience

Kaplan-Meier estimates of survival at 3 years were 66%, 79%, and 85% in the 5-, 20-, and 80- mg TID dose groups, respectively. Sildenafil 80 mg was also superior to 5 mg for time to first event of clinical worsening with HR (99.7% CI) = 0.44 (0.22, 0.89). Hazard Ratios for Time to First Event of Clinical Worsening – Intent To Treat Population Note: Sildenafil 5 mg is not an approved dosage. Abbreviations: 6MWD = 6-minute walk distance; CI = confidence interval; PAH = pulmonary arterial hypertension. Clinical worsening events were defined as reduction from baseline in the 6MWD test by at least 15% and worsening functional class from baseline, both confirmed by a second test/evaluation within 2 weeks. PAH as the first event of clinical worsening.

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d.

Step	Description	Notes
Consult a healthcare provider	Discuss suitability and health conditions	Important before use
Dose administration	Take with a glass of water, 30-60 min before activity	Avoid heavy or fatty meals
Frequency	Do not exceed once per day	Follow prescribed instructions
Food interactions	Fatty meals may delay absorption	Better taken on an empty stomach or light meal

Count of deaths as the first event of clinical worsening.

16. How is Sildenafil Oral Suspension supplied

Patients were randomized to receive placebo (n = 70) or sildenafil 20 mg (n = 69), 40 mg (n = 67) or 80 mg (n = 71) three times a day for a period of 12 weeks. Placebo-corrected mean increases in walk distance of 45 to 50 meters were observed with all doses of sildenafil. These increases were significantly different from placebo, but the sildenafil dose groups were not different from each other (see Figure 3), indicating no additional clinical benefit from doses higher than 20 mg three times a day. SUPER-2 (NCT00159887) Long-Term Treatment of PAH In a long-term follow-up of patients who were treated with sildenafil (n = 277), K-M estimates of survival at 1, 2, and 3 years were 94%, 88% , and 79%, respectively. PACES-1 (NCT00159861) - Sildenafil Co-Administered with Epoprostenol A randomized, double-blind, placebo-controlled study (PACES-1) was conducted in 267 patients with PAH who were taking stable doses of intravenous epoprostenol.

Drugs you should not use with sildenafil

Patients were randomized to placebo or sildenafil (in a fixed titration starting from 20 mg to 40 mg and then 80 mg, three times a day) and all patients continued intravenous epoprostenol therapy. There was a statistically significant greater increase from baseline in 6-minute walk distance at Week 16 (primary endpoint) for the sildenafil group compared with the placebo group. The mean change from baseline at Week 16 (last observation carried forward) was 30 meters for the sildenafil group compared with 4 meters for the placebo group giving an adjusted treatment difference of 26 meters (95% CI: 10.8, 41.2) (p = 0.0009). Patients on sildenafil achieved a statistically significant reduction in mPAP compared to those on placebo. A mean placebo-corrected treatment effect sildenafil 20 mg tablets of -3.9 mmHg was observed in favor of sildenafil (95% CI: -5.7, -2.1) (p = 0.00003).

Erectile dysfunction

Kaplan-Meier estimates and a stratified log-rank test demonstrated that placebo-treated patients were 3 times more likely to experience a clinical worsening event than sildenafil-treated patients and that sildenafil-treated patients experienced a significant delay in time to clinical worsening versus placebo-treated patients (p = 0.0074). Kaplan-Meier Plot of Time (in Days) to Clinical Worsening of PAH in PACES-1 Improvements in WHO Functional Class for PAH were also demonstrated in patients on sildenafil compared to placebo. More than twice as many sildenafil-treated patients (36%) as placebo-treated patients (14%) showed an improvement in at least one functional New York Heart Association (NYHA) class for PAH. Study A1481243 (NCT00323297) - Sildenafil Added to Bosentan Therapy – Lack of Effect on Exercise Capacity A randomized, double-blind, placebo-controlled study was conducted in 103 patients with PAH who were on bosentan therapy for a minimum of 3 months. Patients (38% male and 62% female) had body weight ≥ 8 kg and had idiopathic pulmonary arterial hypertension (33%), or PAH associated with congenital heart disease (systemic-to-pulmonary shunt 37%, surgical repair 30%). e.

MeSH terms

In this trial, 27% of patients were < 7 years old. The primary objective of the study was to assess the effect of sildenafil on percent change from baseline in PVO2, normalized to body weight, from baseline to week 16 as measured by the Cardiopulmonary Exercise Test (CPET) (patients who were developmentally able to perform the test, n = 115). A total of 45% of patients were evaluable for CPET, which comprised those children ≥ 7 years old and developmentally able to perform the test. Children < 7 years were evaluable only for the secondary endpoints. Percentage Change from Baseline in VO2Peak: Mean (95% Confidence Intervals) The estimated difference between the combined sildenafil doses and placebo was 8% (95% CI: - 0.2 to 16).

How sildenafil is used

The results of the main analysis (combined dose groups versus placebo) were not statistically significant (p = 0.056). The estimated difference between the sildenafil medium dose group and placebo was 11 ± 5% (95% CI: 2 to 21). Dose related improvements were observed with PVRI and mPAP. Patients who had been in the placebo group in the shortterm study were randomly reassigned to sildenafil treatment; patients weighing ≤ 20 kg entered the medium or high dose groups (1:2), while patients weighing > 20 kg entered the low, medium, or high dose groups (1:1:1). Similarly, 191 of 229 patients (83%) who had received sildenafil had either maintained or improved their WHO Functional Class at 1 year Kaplan-Meier estimates of survival at 3 years in patients > 20 kg in weight at baseline were 94%, 93%, and 85% in the low, medium, and high dose groups, respectively; for patients ≤ 20 kg in weight at baseline, the survival estimates were 94% and 93% for patients in the medium and high dose groups, respectively [see Use in Specific Populations (8.4) and Adverse Reactions (6.1)].

What’s the best sildenafil dosage for beginners?

Study A1481324 (NCT02060487) - Study to Assess the Effects of Sildenafil on Mortality in Adults with PAH A study to assess the effects of multiple doses of sildenafil on mortality in adults with PAH was conducted following the observation of a higher risk of mortality in pediatric patients taking a high dose of sildenafil TID, based on body weight, compared to those taking a lower dose of sildenafil in the long-term extension of the pediatric clinical trial. At the time of a planned interim analysis (50% deaths) it was identified that the primary efficacy objective of this protocol was met and therefore the study was stopped. Primary comparison of the 80 mg TID group to the 5 mg TID group yielded the HR (99.7% CI) = 0.51 (0.22, 1.21); i.e., non-inferiority was established. Hazard Ratios for Overall Survival, Assessed in the Proportional Hazards Model – Intent To Treat Population On treatment deaths: Any death within 7 days of last dose was regarded as “On treatment”, thus might include deaths occurred after discontinuation from study treatment. Hazard ratio estimates from the proportional Hazards model, stratified by actual previous PAH treatment and etiology of PAH. Hazard ratio estimates from the proportional Hazards model, stratified

• Sildenafil tablets 125 mg are manufactured by various brands.
• Always verify the authenticity of medication sources.
• Use only FDA-approved or certified pharmacies.
• Cost can vary based on brand and location.
• Generic versions are typically more affordable.
• Beware of counterfeit sildenafil products.
• Read customer reviews before purchasing online.
• Consult your doctor about the best brand for you.

by actual previous PAH treatment and etiology of PAH.

• Sildenafil tablets 125 mg are often prescribed for pulmonary hypertension.
• The dosage can vary depending on the condition.
• It’s important to maintain open communication with your doctor.
• Alcohol consumption can impair sildenafil’s effectiveness.
• Avoid driving if you experience dizziness or vision problems.
• Use sildenafil exactly as prescribed to avoid complications.
• Do not share medication with others.
• Regular medical check-ups are recommended during use.

Sildenafil for Oral Suspension, 10 mg/mL is supplied in amber pet bottles.

2.2 Use with Food

Larger effects were recorded among patients receiving concomitant nitrates [see Contraindications (4)]. After chronic dosing of 80 mg three times a day sildenafil to healthy volunteers, the largest mean change from baseline in supine systolic and supine diastolic blood pressures was a decrease of 9 mmHg and 8.4 mmHg, respectively. After chronic dosing of 80 mg three times a day sildenafil to patients with systemic hypertension, the mean change from baseline in systolic and diastolic blood pressures was a decrease of 9.4 and 9.1 mmHg, respectively. An evaluation of visual function at doses up to 200 mg revealed no effects of sildenafil on visual acuity, intraocular pressure, or pupillometry. Sildenafil is rapidly absorbed after oral administration, with a mean absolute bioavailability of 41% (25 to 63%).

Does sildenafil interact with other medicines (drug interactions)?

When sildenafil is taken with a high-fat meal, the rate of absorption is reduced, with a mean delay in Tmax of 60 minutes and a mean reduction in Cmax of 29%. Sildenafil Injection: The pharmacokinetic profile of sildenafil has been characterized following intravenous administration. A 10 mg dose of sildenafil injection is predicted to provide a pharmacological effect of sildenafil and its N-desmethyl metabolite equivalent to that of a 20 mg oral dose. Population Pharmacokinetics Age, gender, race, and renal and hepatic function were included as factors assessed in the population pharmacokinetic model to evaluate sildenafil pharmacokinetics in patients with PAH. Pediatric Patients Body weight was shown to be a good predictor of drug exposure in children.

Typical dosages

In volunteers with severe (CLcr less than 30 mL/min) renal impairment, sildenafil clearance was reduced, resulting in approximately doubling of AUC and Cmax compared to age-matched volunteers with no renal impairment. In addition, N-desmethyl metabolite AUC and Cmax values were significantly increased 200% and 79%, respectively, in patients with severe renal impairment compared to patients with normal renal function. Effects of Other Drugs on Sildenafil Pharmacokinetics Population pharmacokinetic analysis of data from patients in clinical trials indicated an approximately 30% reduction in sildenafil clearance when it was co-administered with mild/moderate CYP3A inhibitors and an approximately 34% reduction in sildenafil clearance when co-administered with beta-blockers. Sildenafil Injection: Predictions based on a pharmacokinetic model suggest that drug-drug interactions with CYP3A inhibitors will be less than those observed after oral sildenafil administration. SUPER-1 (NCT00644605) - Sildenafil Monotherapy [20 mg, 40 mg, and 80 mg Three Times a Day] A randomized, double-blind, placebo-controlled study of sildenafil (SUPER-1) was conducted in 277 patients with PAH (defined as a mean pulmonary artery pressure ≥ 25 mmHg at rest with a pulmonary capillary wedge pressure < 15 mmHg).

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