USE IN SPECIFIC POPULATIONS

In addition, patients were asked a global efficacy question and an optional partner questionnaire was administered.Efficacy Results from Controlled Clinical StudiesThe effect on one of the major end points, maintenance of erections after penetration, is shown in Figure 6, for the pooled results of 5 fixed-dose, dose-response studies of greater than one month duration, showing response according to baseline function. Results with all doses have been pooled, but scores showed greater improvement at the 50 and 100 mg doses than at 25 mg. The pattern of responses was similar for the other principal question, the ability to achieve an erection sufficient for intercourse. The titration studies, in which most patients received 100 mg, showed similar results.

Figure 6 shows that regardless of the baseline levels of function, subsequent function in patients treated with sildenafil was better than that seen in patients treated with placebo. At the same time, on-treatment function was better in treated patients who were less impaired at baseline.The frequency of patients reporting improvement of erections in response to a global question in four of the randomized, double-blind, parallel, placebo-controlled fixed dose studies (1797 patients) of 12 to 24 weeks duration is shown in Figure 7.

These patients had erectile dysfunction at baseline that was characterized by median categorical scores of 2 (a few times) on principal IIEF questions. Erectile dysfunction was attributed to organic (58%; generally not characterized, but including diabetes and excluding spinal cord injury), psychogenic (17%), or mixed (24%) etiologies.

How to Order

It is not possible to determine whether these events are related directly to the use of PDE5 inhibitors or to other factors [ see Warnings and Precautions (5.4)and Adverse Reactions (6.2)].PriapismPhysicians should warn patients that prolonged erections greater than 4 hours and priapism (painful erections greater than 6 hours in duration) have been reported infrequently since market approval of sildenafil. If priapism is not treated immediately, penile tissue damage and permanent loss of potency may result [ see Warnings and Precautions (5.2)].Avoid Use with other PDE5 InhibitorsPhysicians should inform patients not to take sildenafil with other PDE5 inhibitors including REVATIO or other pulmonary arterial hypertension (PAH) treatments containing sildenafil. Sildenafil is also marketed as REVATIO for the treatment of PAH. The safety and efficacy of sildenafil with other PDE5 inhibitors, including REVATIO, have not been studied [ see Warnings and Precautions (5.7)].Sexually Transmitted DiseaseThe use of sildenafil offers no protection against sexually transmitted diseases. Counseling of patients about the protective measures necessary to guard against sexually transmitted diseases, including the Human Immunodeficiency Virus (HIV), may be considered [ see Warnings and Precautions (5.9)].

Incidence not known

Sixty-three percent, 74%, and 82% of the patients on 25 mg, 50 mg and 100 mg of sildenafil, respectively, reported an improvement in their erections, compared to 24% on placebo. In the titration studies (n=644) (with most patients eventually receiving 100 mg), results were similar.The patients in studies had varying degrees of ED. One-third to one-half of the subjects in these studies reported successful intercourse at least once during a 4-week, treatment-free run-in period.In many of the studies, of both fixed dose and titration designs, daily diaries were kept by patients. In these studies, involving about 1600 patients, analyses of patient diaries showed no effect of sildenafil on rates of attempted intercourse (about 2 per week), but there was clear treatment-related improvement in sexual function: per patient weekly success rates averaged 1.3 on 50 to 100 mg of sildenafil vs 0.4 sildenafil citrate tablets 150 mg on placebo; similarly, group mean success rates (total successes divided by total attempts) were about 66% on sildenafil vs about 20% on placebo.During 3 to 6 months of double-blind treatment or longer-term (1 year), open-label studies, few patients withdrew from active treatment for any reason, including lack of effectiveness. At the end of the long-term study, 88% of patients reported that sildenafil improved their erections.Men with untreated ED had relatively low baseline scores for all aspects of sexual function measured (again using a 5-point scale) in the IIEF.

Sildenafil improved these aspects of sexual function: frequency, firmness and maintenance of erections; frequency of orgasm; frequency and level of desire; frequency, satisfaction and enjoyment of intercourse; and overall relationship satisfaction.One randomized, double-blind, flexible-dose, placebo-controlled study included only patients with erectile dysfunction attributed to complications of diabetes mellitus (n=268).

• Sildenafil 100 mg does not protect against sexually transmitted diseases.
• It is not recommended for women or children.
• The medication can sometimes cause back pain or muscle aches.
• Use sildenafil only as prescribed to minimize risks.
• Some users report facial flushing after taking the pill.
• Avoid excessive physical activity immediately after taking the drug.
• Always read the patient information leaflet before use.
• Do not share your medication with others.
• Sildenafil may cause nasal stuffiness or congestion.

As in the other titration studies, patients were started on 50 mg and allowed to adjust the dose up to 100 mg or down to 25 mg of sildenafil; all patients, however, were receiving 50 mg or 100 mg at the end of the study. There were highly statistically significant improvements on the two principal IIEF questions (frequency of successful penetration during sexual activity and maintenance of erections after penetration) on sildenafil compared to placebo. On a global improvement question, 57% of sildenafil patients reported improved erections versus 10% on placebo.

Society and culture

In addition, patients were asked a global efficacy question and an optional partner questionnaire was administered.Efficacy Results from Controlled Clinical StudiesThe effect on one of the major end points, maintenance of erections after penetration, is shown in Figure 6, for the pooled results of 5 fixed-dose, dose-response studies of greater than one month duration, showing response according to baseline function. Results with all doses have been pooled, but scores showed greater improvement at the 50 and 100 mg doses than at 25 mg. The pattern of responses was similar for the other principal question, the ability to achieve an erection sufficient for intercourse. The titration studies, in which most patients received 100 mg, showed similar results. Figure 6 shows that regardless of the baseline levels of function, subsequent function in patients treated with sildenafil was better than that seen in patients treated with placebo.

Is 20 mg of sildenafil effective for ED?

At the same time, on-treatment function was better in treated patients who were less impaired at baseline.The frequency of patients reporting improvement of erections in response to a global question in four of the randomized, double-blind, parallel, placebo-controlled fixed dose studies (1797 patients) of 12 to 24 weeks duration is shown in Figure 7. These patients had erectile dysfunction at baseline that was characterized by median categorical scores of 2 (a few times) on principal IIEF questions. Erectile dysfunction was attributed to organic (58%; generally not characterized, but including diabetes and excluding spinal cord injury), psychogenic (17%), or mixed (24%) etiologies. Sixty-three percent, 74%, and 82% of the patients on 25 mg, 50 mg and 100 mg of sildenafil, respectively, reported an improvement in their erections, compared to 24% on placebo. In the titration studies (n=644) (with most patients eventually receiving 100 mg), results were similar.The patients in studies had varying degrees of ED.

Drug forms and uses

One-third to one-half of the subjects in these studies reported successful intercourse at least once during a 4-week, treatment-free run-in period.In many of the studies, of both fixed dose and titration designs, daily diaries were kept by patients. In these studies, involving about 1600 patients, analyses of patient diaries showed no effect of sildenafil on rates of attempted intercourse (about 2 per week), but there was clear treatment-related improvement in sexual function: per patient weekly success rates averaged 1.3 on 50 to 100 mg of sildenafil vs 0.4 sildenafil citrate tablets 150 mg on placebo; similarly, group mean success rates (total successes divided by total attempts) were about 66% on sildenafil vs about 20% on placebo.During 3 to 6 months of double-blind treatment or longer-term (1 year), open-label studies, few patients withdrew from active treatment for any reason, including lack of effectiveness. At the end of the long-term study, 88% of patients reported that sildenafil improved their erections.Men with untreated ED had relatively low baseline scores for all aspects of sexual function measured (again using a 5-point scale) in the IIEF. Sildenafil improved these aspects of sexual function: frequency, firmness and maintenance of erections; frequency of orgasm; frequency and level of desire; frequency, satisfaction and enjoyment of intercourse; and overall relationship satisfaction.One randomized, double-blind, flexible-dose, placebo-controlled study included only patients with erectile dysfunction attributed to complications of diabetes mellitus (n=268). As in the other titration studies, patients were started on 50 mg and allowed to adjust the dose up to 100 mg or down to 25 mg of sildenafil; all patients, however, were receiving 50 mg or 100 mg at the end of the study. Diary data indicated that on sildenafil, 48% of intercourse attempts were successful versus 12% on placebo.One randomized, double-blind, placebo-controlled, crossover, flexible-dose (up to 100 mg) study of patients with erectile dysfunction resulting from spinal cord injury (n=178) was conducted. The changes from baseline in scoring on the two end point questions (frequency of successful penetration during sexual activity and maintenance of erections after penetration) were highly statistically significantly in favor of sildenafil.

Reviews for Sildenafil

There were highly statistically significant improvements on the two principal IIEF questions (frequency of successful penetration during sexual activity and maintenance of erections after penetration) on sildenafil compared to placebo. On a global improvement question, 57% of sildenafil patients reported improved erections versus 10% on placebo. Diary data indicated that on sildenafil, 48% of intercourse attempts were successful versus 12% on placebo.One randomized, double-blind, placebo-controlled, crossover, flexible-dose (up to 100 mg) study of patients with erectile dysfunction resulting from spinal cord injury (n=178) was conducted. The changes from baseline in scoring on the two end point questions (frequency of successful penetration during sexual activity and maintenance of erections after penetration) were highly statistically significantly in favor of sildenafil. On a global improvement question, 83% of patients reported improved erections on sildenafil versus 12% on placebo.

Marketing and sales

Diary data indicated that on sildenafil, 59% of attempts at sexual intercourse were successful compared to 13% on placebo.Across all trials, sildenafil improved the erections of 43% of radical prostatectomy patients compared to 15% on placebo.Subgroup analyses of responses to a global improvement question in patients with psychogenic etiology in two fixed-dose studies (total n=179) and two titration studies (total n=149) showed 84% of sildenafil patients reported improvement in erections compared with 26% of placebo. Diary data in two of the studies (n=178) showed rates of successful intercourse per attempt of 70% for sildenafil and 29% for placebo.Efficacy Results in Subpopulations in Controlled Clinical StudiesA review of population subgroups demonstrated efficacy regardless of baseline severity, etiology, race and age. Sildenafil was effective in a broad range of ED patients, including those with a history of coronary artery disease, hypertension, other cardiac disease, peripheral vascular disease, diabetes mellitus, depression, coronary artery bypass graft (CABG), radical prostatectomy, transurethral resection of the prostate (TURP) and spinal cord injury, and in patients taking antidepressants/antipsychotics and anti-hypertensives/diuretics. 17 PATIENT COUNSELING INFORMATION Advise the patient to read the FDA-approved patient labeling (Patient Information)NitratesPhysicians should discuss with patients the contraindication of sildenafil with regular and/or intermittent use of nitric oxide donors, such as organic nitrates or organic nitrites in any form [ see Contraindications (4.1)].Guanylate Cyclase (GC) StimulatorsPhysicians should discuss with patients the contraindication of sildenafil with use of guanylate cyclase stimulators such as riociguat [ see Contraindications (4.3)].Concomitant Use with Drugs Which Lower Blood PressurePhysicians should advise patients of the potential for sildenafil to augment the blood pressure lowering effect of alpha-blockers and anti-hypertensive medications. Concomitant administration of sildenafil and an alpha-blocker may lead to symptomatic hypotension in some patients.

Can Viagra be crushed, split, or chewed?

Therefore, when sildenafil is co-administered with alpha-blockers, patients should be stable on alpha-blocker therapy prior to initiating sildenafil treatment and sildenafil should be initiated at the lowest dose [ see Warnings and Precautions (5.5)].Cardiovascular ConsiderationsPhysicians should discuss with patients the potential cardiac sildenafil 50 mg tab risk of sexual activity in patients with preexisting cardiovascular risk factors. Patients who experience symptoms (e.g., angina pectoris, dizziness, nausea) upon initiation of sexual activity should be advised to refrain from further activity and should discuss the episode with their physician [ see Warnings and Precautions (5.1)].Sudden Loss of VisionPhysicians should advise patients to stop use of all PDE5 inhibitors, including sildenafil, and seek medical attention in the event of a sudden loss of vision in one or both eyes. Such an event may be a sign of non-arteritic anterior ischemic optic neuropathy (NAION), a cause of decreased vision including possible permanent loss of vision, that has been reported rarely post-marketing in temporal association with the use of all PDE5 inhibitors. Physicians should discuss with patients the increased risk of NAION in individuals who have already experienced NAION in one eye. Physicians should also discuss with patients the increased risk of NAION among the general population in patients with a “crowded” optic disc, although evidence is insufficient to support screening of prospective users of PDE5 inhibitor, including sildenafil, for this uncommon condition [ see Warnings and Precautions (5.3)and Adverse Reactions (6.2)].Sudden Hearing LossPhysicians should advise patients to stop taking PDE5 inhibitors, including sildenafil, and seek prompt medical attention in the event of sudden decrease or loss of hearing. On a global improvement question, 83% of patients reported improved erections on sildenafil versus 12% on placebo. Diary data indicated that on sildenafil, 59% of attempts at sexual intercourse were successful compared to 13% on placebo.Across all trials, sildenafil improved the erections of 43% of radical prostatectomy patients compared to 15% on placebo.Subgroup analyses of responses to a global improvement question in patients with psychogenic etiology in two fixed-dose studies (total n=179) and two titration studies (total n=149) showed 84% of sildenafil patients reported improvement in erections compared with 26% of placebo. Diary data in two of the studies (n=178) showed rates of successful intercourse per attempt of 70% for sildenafil and 29% for placebo.Efficacy Results in Subpopulations in Controlled Clinical StudiesA review of population subgroups demonstrated efficacy regardless of baseline severity, etiology, race and age. Sildenafil was effective in a broad range of ED patients, including those with a history of coronary artery disease, hypertension, other cardiac disease, peripheral vascular disease, diabetes mellitus, depression, coronary artery bypass graft (CABG), radical prostatectomy, transurethral resection of the prostate (TURP) and spinal cord injury, and in patients taking antidepressants/antipsychotics and anti-hypertensives/diuretics. 17 PATIENT COUNSELING INFORMATION Advise the patient to read the FDA-approved patient labeling (Patient Information)NitratesPhysicians should discuss with patients the contraindication of sildenafil with regular and/or intermittent use of nitric oxide donors, such as organic nitrates or organic nitrites in any form [ see Contraindications (4.1)].Guanylate Cyclase (GC) StimulatorsPhysicians should discuss with patients the contraindication of sildenafil with use of guanylate cyclase stimulators such as riociguat [ see Contraindications (4.3)].Concomitant Use with Drugs Which Lower Blood PressurePhysicians should advise patients of the potential for sildenafil to augment the blood pressure lowering effect of alpha-blockers and anti-hypertensive medications. Concomitant administration of sildenafil and an alpha-blocker may lead to symptomatic hypotension in some patients. Therefore, when sildenafil is co-administered with alpha-blockers, patients should be stable on alpha-blocker therapy prior to initiating sildenafil treatment and sildenafil should be initiated at the lowest dose [ see Warnings and Precautions (5.5)].Cardiovascular ConsiderationsPhysicians should discuss with patients the potential cardiac sildenafil 50 mg tab risk of sexual activity in patients with preexisting cardiovascular risk factors.

• Sildenafil’s effectiveness depends on sexual stimulation.
• It is not an aphrodisiac and requires arousal to work.
• Drinking large quantities of alcohol may impair its effectiveness.
• The drug can cause a prolonged erection if misused.
• Sildenafil may lead to sudden vision or hearing changes.
• Always discuss all medications you are taking with your doctor.
• Missing a dose should not be remedied by doubling the next dose.
• Use caution if you have a history of eye problems like retinitis pigmentosa.
• Consult your doctor before starting or stopping sildenafil treatment.

Patients who experience symptoms (e.g., angina pectoris, dizziness, nausea) upon initiation of sexual activity should be advised to refrain from further activity and should discuss the episode with their physician [ see Warnings and Precautions (5.1)].Sudden Loss of VisionPhysicians should advise patients to stop use of all PDE5 inhibitors, including sildenafil, and seek medical attention in the event of a sudden loss of vision in one or both eyes.

7. Notes when using Welgra 100

Such an event may be a sign of non-arteritic anterior ischemic optic neuropathy (NAION), a cause of decreased vision including possible permanent loss of vision, that has been reported rarely post-marketing in temporal association with the use of all PDE5 inhibitors. Physicians should discuss with patients the increased risk of NAION in individuals who have already experienced NAION in one eye. Physicians should also discuss with patients the increased risk of NAION among the general population in patients with a “crowded” optic disc, although evidence is insufficient to support screening of prospective users of PDE5 inhibitor, including sildenafil, for this uncommon condition [ see Warnings and Precautions (5.3)and Adverse Reactions (6.2)].Sudden Hearing LossPhysicians should advise patients to stop taking PDE5 inhibitors, including sildenafil, and seek prompt medical attention in the event of sudden decrease or loss of hearing. It is not possible to determine whether these events are related directly to the use of PDE5 inhibitors or to other factors [ see Warnings and Precautions (5.4)and Adverse Reactions (6.2)].PriapismPhysicians should warn patients that prolonged erections greater than 4 hours and priapism (painful erections greater than 6 hours in duration) have been reported infrequently since market approval of sildenafil. If priapism is not treated immediately, penile tissue damage and permanent loss of potency may result [ see Warnings and Precautions (5.2)].Avoid Use with other PDE5 InhibitorsPhysicians should inform patients not to take sildenafil with other PDE5 inhibitors including REVATIO or other pulmonary arterial hypertension (PAH) treatments containing sildenafil. Sildenafil is also marketed as REVATIO for the treatment of PAH. The safety and efficacy of sildenafil with other PDE5 inhibitors, including REVATIO, have not been studied [ see Warnings and Precautions (5.7)].Sexually Transmitted DiseaseThe use of sildenafil offers no protection against sexually transmitted diseases. Counseling of patients about the protective measures necessary to guard against sexually transmitted diseases, including the Human Immunodeficiency Virus (HIV), may be considered [ see Warnings and Precautions (5.9)].