Proper Use

Using more than this can lead to serious side effects. Call your doctor right away if you think you’ve taken too much Viagra. You can also call 800-222-1222 to reach America’s Poison Centers or use its online resource. But if you have severe symptoms, call 911 (or your local emergency number) immediately or go to the nearest emergency room. The sections above describe the typical dosages provided by the drug’s manufacturer.

Drugs Affecting Gastric Acidity

If your doctor recommends Viagra for you, they will prescribe the dosage that’s right for you. Remember, you should not change your dosage of Viagra without your doctor’s recommendation. Talk with your doctor if you have questions or concerns about your current dosage. Here are some questions you may want to discuss with your doctor: How long should I give Viagra to work before my dosage should be increased? Should I take a lower dosage of Viagra because of my other medications?

Does sildenafil interact with foods or drinks?

Would a higher dosage of Viagra increase my risk for side effects? To learn more about Viagra, see these articles: Disclaimer: Healthline has made every effort to make certain that all information is factually correct, comprehensive, and up to date. We evaluated the efficacy and safety of sildenafil, administered as needed in two sequential double-blind studies of men with erectile dysfunction of organic, psychogenic, or mixed causes. In a 24-week dose–response study, 532 men were treated with oral sildenafil (25, 50, or 100 mg) or placebo. In a 12-week, flexible dose-escalation study, 329 different men were treated with sildenafil or placebo, with dose escalation to 100 mg based on efficacy and tolerance. the severity of your erectile dysfunction (ED) how well Viagra works for your ED other medications you take (see “Dosage adjustments” under “What is Viagra’s dosage?”) other conditions you have (see “Dosage adjustments” under “What is Viagra’s dosage?”) Optum Perks is owned by RVO Health. By clicking on this link, we may receive a commission. You’ll take Viagra by mouth about 1 hour before sexual activity. You can take Viagra with or without food. But the drug may not work as quickly if you take it with foods containing a lot of fat, such as fried foods. In this case, Viagra could take up to an hour longer to start working.

Product	Dosage	Quantity + Bonus	Price
Viagra Generic	200mg	270 + 10 Pills	379.76€ 361.68€
Kamagra Oral Jelly	100mg	21 Sachets	95.92€ 91.35€
Kamagra	100mg	84 + 6 Pills	264.44€ 251.85€
Viagra Generic	50mg	90 + 6 Pills	107.37€ 102.26€
Viagra Generic	150mg	270 + 10 Pills	326.61€ 311.06€
Viagra Generic	50mg	20 Pills	40.52€ 38.59€
Viagra Generic	25mg	30 + 4 Pills	47.97€ 45.69€
Viagra Generic	200mg	30 + 2 Pills	83.07€ 79.11€
Viagra Generic	100mg	180 + 8 Pills	199.37€ 189.88€
Viagra Generic	100mg	20 Pills	45.58€ 43.41€
Viagra Generic	50mg	180 + 8 Pills	158.82€ 151.26€
Viagra Generic	25mg	270 + 8 Pills	184.26€ 175.49€
Kamagra Soft Tabs	100mg	120 + 6 Pills	311.78€ 296.93€
Viagra Generic	50mg	30 + 4 Pills	54.26€ 51.68€
Kamagra Soft Tabs	100mg	180 + 8 Pills	425.45€ 405.19€
Viagra Generic	100mg	10 Pills	28.91€ 27.53€
Kamagra Soft Tabs	100mg	60 + 4 Pills	180.59€ 171.99€

Viagra is a medication that you’ll only take when you need it, about 1 hour before sexual activity. You don’t have to take it regularly for it to be effective. If you forget to take Viagra an hour before sex, you can take it as soon 50 mg sildenafil price as you remember. It starts working to improve erectile function as soon as 30 minutes after you take your dose.

Related/similar drugs

After this dose-escalation study, 225 of the 329 men entered a 32-week, open-label extension study. We assessed efficacy according to the International Index of Erectile Function, a patient log, and a global-efficacy question. In the dose–response study, increasing doses of sildenafil were associated with improved erectile function (P values sildenafil tablets 125 for increases in scores for questions about achieving and maintaining erections were <0.001). For the men receiving 100 mg of sildenafil, the mean score for the question about achieving erections was 100 percent higher after treatment than at base line (4.0 vs. 2.0 of a possible score of 5).

Regional issues

In the last four weeks of treatment in the dose-escalation study, 69 percent of all attempts at sexual intercourse were successful for the men receiving sildenafil, as compared with 22 percent for those receiving placebo (P<0.001). The mean numbers of successful attempts per month were 5.9 for the men receiving sildenafil and 1.5 for those receiving placebo (P<0.001). Headache, flushing, and dyspepsia were the most common adverse effects in the dose-escalation study, occurring in 6 percent to 18 percent of the men. Ninety-two percent of the men completed the 32-week extension study. Oral sildenafil is an effective, well-tolerated treatment for men with erectile dysfunction.

Missed Dose

Erectile dysfunction, the persistent inability to achieve or maintain an erection sufficient for satisfactory sexual performance, is estimated to affect up to 30 million men in the United States.1 The disorder is age-associated,1–3 with estimated prevalence rates of 39 percent among men 40 years old and 67 percent among those 70 years old.2 The available treatments include vacuum-constriction devices; intracavernosal injections of vasoactive agents, including alprostadil (prostaglandin E1)4; transurethral delivery of alprostadil5; implantation of penile prostheses; and venous or arterial surgery. No effective oral therapy for erectile dysfunction is currently available.6 Normal penile erection depends on the relaxation of smooth muscles in the corpora cavernosa. In response to sexual stimuli, cavernous nerves and endothelial cells release nitric oxide, which stimulates the formation of cyclic guanosine monophosphate (GMP) by guanylate cyclase.7–9 The mechanism by which cyclic GMP stimulates relaxation of the smooth muscles remains to be elucidated. Sildenafil is a selective inhibitor of cyclic-GMP–specific phosphodiesterase type 5, the predominant isozyme metabolizing cyclic GMP in the corpus cavernosum.10 By selectively inhibiting cyclic-GMP catabolism in cavernosal smooth-muscle cells,11 sildenafil would be expected to restore the natural erectile response to sexual stimulation but not cause erections in the absence of such stimulation. Sildenafil is rapidly absorbed, with maximal plasma concentrations occurring within one hour after oral administration and a mean terminal half-life of three to five hours.10 In a placebo-controlled pilot study of 12 men, sildenafil significantly improved the erectile response during visual sexual stimulation.10,12 We therefore undertook two studies to evaluate in a home setting the efficacy and safety of sildenafil in men with erectile dysfunction. Its effects usually last about 4 hours. If you need help remembering to take your dose of Viagra before sex, try setting an alarm or downloading a reminder app. Or ask your partner to remind you to take your dose about an hour before sex. Do not use more Viagra than your doctor prescribes. Using more than this can lead to serious side effects.

Patient Group	Recommended Dosage	Administration Timing	Special Considerations
Adult Men with ED	50 mg as needed	30 to 60 minutes before sexual activity	Adjust based on efficacy and tolerability
Elderly Patients	Same as adults, starting with lower dose	50 mg usually appropriate	Monitor for side effects
Patients with Liver Impairment	Consult healthcare provider	Dose adjustments may be necessary	Increased risk of side effects
Patients on CYP3A4 inhibitors	Lower dose recommended	Due to increased drug levels	e.g., ketoconazole, ritonavir

Call your doctor right away if you think you’ve taken too much Viagra. You can also call 800-222-1222 to reach America’s Poison Centers or use its online resource. But if you have severe symptoms, call 911 (or your local emergency number) immediately or go to the nearest emergency room. The sections above describe the typical dosages provided by the drug’s manufacturer. If your doctor recommends Viagra for you, they will prescribe the dosage that’s right for you. Remember, you should not change your dosage of Viagra without your doctor’s recommendation. Talk with your doctor if you have questions or concerns about your current dosage.

Sildenafil can cause side effects like dizziness.
Use with caution if you have liver or kidney issues.
The medication may cause vision changes or blurriness.
Take sildenafil on an empty stomach for quicker effect.
Follow your doctor’s dosage instructions strictly.
Overdose may lead to serious health complications.
Avoid driving or operating machinery after taking.
Use only the prescribed strength, 50 mg.

Here are some questions you may want to discuss with your doctor: How long should I give Viagra to work before my dosage should be increased? Should I take a lower dosage of Viagra because of my other medications? Would a higher dosage of Viagra increase my risk for side effects? To learn more about Viagra, see these articles: Disclaimer: Healthline has made every effort to make certain that all information is factually correct, comprehensive, and up to date. We evaluated the efficacy and safety of sildenafil, administered as needed in two sequential double-blind studies of men with erectile dysfunction of organic, psychogenic, or mixed causes. In a 24-week dose–response study, 532 men were treated with oral sildenafil (25, 50, or 100 mg) or placebo. In a 12-week, flexible dose-escalation study, 329 different men were treated with sildenafil or placebo, with dose escalation to 100 mg based on efficacy and tolerance. After this dose-escalation study, 225 of the 329 men entered a 32-week, open-label extension study. We assessed efficacy according to the International Index of Erectile Function, a patient log, and a global-efficacy question. In the dose–response study, increasing doses of sildenafil were associated with improved erectile function (P values sildenafil tablets 125 for increases in scores for questions about achieving and maintaining erections were <0.001). For the men receiving 100 mg of sildenafil, the mean score for the question about achieving erections was 100 percent higher after treatment than at base line (4.0 vs. 2.0 of a possible score of 5).

Sildenafil 50 mg tablets are used to treat erectile dysfunction.
The medicine improves blood flow to the penis.
Take sildenafil 50 mg 30-60 minutes before activity.
Do not exceed one tablet per 24 hours.
Common side effects include headache and flushing.
Avoid consuming high-fat meals before taking it.
Alcohol may reduce the effectiveness of the medication.
Consult a doctor if you experience prolonged erections.

Sildenafil 50 mg is available by prescription only.
Store tablets in a cool, dry place away from sunlight.
Do not use with nitrate medications to prevent risk.
Seek medical advice if you have heart problems.
It may interact with other medications like antihypertensives.
Not recommended for women or children.
The tablet should be swallowed whole with water.
Do not crush or chew the tablet.

Ninety-two percent of the men completed the 32-week extension study. Oral sildenafil is an effective, well-tolerated treatment for men with erectile dysfunction. Erectile dysfunction, the persistent inability to achieve or maintain an erection sufficient for satisfactory sexual performance, is estimated to affect up to 30 million men in the United States.1 The disorder is age-associated,1–3 with estimated prevalence rates of 39 percent among men 40 years old and 67 percent among those 70 years old.2 The available treatments include vacuum-constriction devices; intracavernosal injections of vasoactive agents, including alprostadil (prostaglandin E1)4; transurethral delivery of alprostadil5; implantation of penile prostheses; and venous or arterial surgery. No effective oral therapy for erectile dysfunction is currently available.6 Normal penile erection depends on the relaxation of smooth muscles in the corpora cavernosa. In response to sexual stimuli, cavernous nerves and endothelial cells release nitric oxide, which stimulates the formation of cyclic guanosine monophosphate (GMP) by guanylate cyclase.7–9 The mechanism by which cyclic GMP stimulates relaxation of the smooth muscles remains to be elucidated. Sildenafil is a selective inhibitor of cyclic-GMP–specific phosphodiesterase type 5, the predominant isozyme metabolizing cyclic GMP in the corpus cavernosum.10 By selectively inhibiting cyclic-GMP catabolism in cavernosal smooth-muscle cells,11 sildenafil would be expected to restore the natural erectile response to sexual stimulation but not cause erections in the absence of such stimulation. Sildenafil is rapidly absorbed, with maximal plasma concentrations occurring within one hour after oral administration and a mean terminal half-life of three to five hours.10 In a placebo-controlled pilot study of 12 men, sildenafil significantly improved the erectile response during visual sexual stimulation.10,12 We therefore undertook two studies to evaluate in a home setting the efficacy and safety of sildenafil in men with erectile dysfunction. In two sequential studies, we studied a total of 861 men 18 years of age or older with a clinical diagnosis of erectile dysfunction (as defined previously1) of six months' duration or longer at 37 centers in the United States.

What does Eroxon Gel contain

Taking higher doses of Viagra can increase your chances of having severe side effects, such as: dangerously low blood pressure, which may increase your risk for heart attack or stroke priapism, a painful erection that lasts longer than 4 hours and could lead to permanent damage to your penis if untreated The dosage of Viagra you’re prescribed may depend on several factors. the severity of your erectile dysfunction (ED) how well Viagra works for your ED other medications you take (see “Dosage adjustments” under “What is Viagra’s dosage?”) other conditions you have (see “Dosage adjustments” under “What is Viagra’s dosage?”) Optum Perks is owned by RVO Health. By clicking on this link, we may receive a commission. You’ll take Viagra by mouth about 1 hour before sexual activity. You can take Viagra with or without food.

Is Viagra dosage based on age or weight?

But the drug may not work as quickly if you take it with foods containing a lot of fat, such as fried foods. In this case, Viagra could take up to an hour longer to start working. Viagra is a medication that you’ll only take when you need it, about 1 hour before sexual activity. You don’t have to take it regularly for it to be effective. If you forget to take Viagra an hour before sex, you can take it as soon 50 mg sildenafil price as you remember.

How should I store sildenafil?

It starts working to improve erectile function as soon as 30 minutes after you take your dose. Its effects usually last about 4 hours. If you need help remembering to take your dose of Viagra before sex, try setting an alarm or downloading a reminder app. Or ask your partner to remind you to take your dose about an hour before sex. Do not use more Viagra than your doctor prescribes. Each man had to be in a stable relationship with a female partner that had sildenafil citrate tables begun at least six months earlier. The cause of erectile dysfunction was determined from the medical history, physical examination, and other diagnostic procedures, including a test involving the intracavernosal injection of a vasoactive drug (done in 31 percent of the men), a RigiScan test of nocturnal penile tumescence (26 percent), penile duplex ultrasonography (21 percent), and endocrine testing (21 percent).

VIAGRA Connect 50mg - 8 Tablets

In two sequential studies, we studied a total of 861 men 18 years of age or older with a clinical diagnosis of erectile dysfunction (as defined previously1) of six months' duration or longer at 37 centers in the United States. Each man had to be in a stable relationship with a female partner that had sildenafil citrate tables begun at least six months earlier. The cause of erectile dysfunction was determined from the medical history, physical examination, and other diagnostic procedures, including a test involving the intracavernosal injection of a vasoactive drug (done in 31 percent of the men), a RigiScan test of nocturnal penile tumescence (26 percent), penile duplex ultrasonography (21 percent), and endocrine testing (21 percent). On the basis of these evaluations, the men were classified as having organic, psychogenic, or mixed erectile dysfunction. Of the 861 men studied, 605 (70 percent) were judged to have organic erectile dysfunction, 99 (11 percent) to have psychogenic erectile dysfunction, and 157 (18 percent) to have mixed erectile dysfunction.

Related treatment guides

Men were excluded if they had penile anatomical defects, a primary diagnosis of another sexual disorder (e.g., premature ejaculation), spinal cord injury, any major psychiatric disorder not well controlled with treatment, poorly controlled diabetes mellitus, active peptic ulcer disease, a history of alcohol or substance abuse, major hematologic, renal, or hepatic abnormalities, or a recent (within the previous six months) stroke or myocardial infarction or if they were receiving nitrate therapy. Other erectile-dysfunction therapies were discontinued at the time of screening (four weeks before the subjects received the study medication). Sildenafil (Viagra) and an identical-looking placebo were supplied by Pfizer. The men were instructed to take a dose approximately one hour before planned sexual activity but not more than once daily. The protocols were approved by the institutional review board at each center, and all the men gave written informed consent.

Dosage adjustments

We assessed efficacy by using the responses to question 3 (frequency of penetration) and question 4 (maintenance of erections after penetration) of the 15-question International Index of Erectile Function, a validated, multidimensional, self-administered questionnaire used for the clinical assessment of erectile dysfunction and treatment outcomes in clinical studies.11 The responses to these two questions pertaining to the ability to achieve and maintain an erection sufficient for sexual intercourse, as described in the definition of erectile dysfunction,1 were rated on a scale of 1 (almost never or never) to 5 (almost always or always). A score of 0 indicated no attempt at sexual intercourse. The mean score for each of the two questions was 4.3 for 109 normal men, 31 to 86 years old, with an age distribution similar to that of the men with erectile dysfunction (unpublished data). Efficacy was also assessed on the basis of the scores for the five separate response domains of male sexual function of the International Index13: erectile function (questions 1 through 5 and 15; possible total score, 1 to 30); orgasmic function (questions 9 and 10; possible total score, 0 to 10); sexual desire (questions 11 and 12; possible total score, 2 to 10); intercourse satisfaction (questions 6, 7, and 8; possible total score, 0 to 15); and overall satisfaction (questions 13 and 14; possible total score, 2 to 10). The domain scores were computed by adding the scores for the individual questions in each domain. On the basis of these evaluations, the men were classified as having organic, psychogenic, or mixed erectile dysfunction.

Side Effect	Frequency	Severity	Management Tips
Headache	Common	Mild to moderate	Analgesics, hydration
Flushing	Common	Mild	Cooling measures, hydration
Nasal Congestion	Common	Mild	Use decongestants cautiously
Dizziness	Less common	Mild to moderate	Avoid operating machinery
Visual Disturbances	Rare	Mild to moderate	Discontinue if persistent
Priapism	Rare	Severe	Immediate medical attention

Of the 861 men studied, 605 (70 percent) were judged to have organic erectile dysfunction, 99 (11 percent) to have psychogenic erectile dysfunction, and 157 (18 percent) to have mixed erectile dysfunction. Men were excluded if they had penile anatomical defects, a primary diagnosis of another sexual disorder (e.g., premature ejaculation), spinal cord injury, any major psychiatric disorder not well controlled with treatment, poorly controlled diabetes mellitus, active peptic ulcer disease, a history of alcohol or substance abuse, major hematologic, renal, or hepatic abnormalities, or a recent (within the previous six months) stroke or myocardial infarction or if they were receiving nitrate therapy. Other erectile-dysfunction therapies were discontinued at the time of screening (four weeks before the subjects received the study medication). Sildenafil (Viagra) and an identical-looking placebo were supplied by Pfizer.

Aspect	Details	Notes
Absorption	Rapid, peak plasma levels in ~30-120 minutes	Food can delay absorption
Distribution	Binds extensively to plasma proteins	Bioavailability approximately 40%
Metabolism	Liver via CYP3A4, CYP2C9	Metabolites excreted primarily in feces
Elimination	Half-life ~4 hours, mostly excreted in feces	Dosage adjustments possible in hepatic impairment

The men were instructed to take a dose approximately one hour before planned sexual activity but not more than once daily. The protocols were approved by the institutional review board at each center, and all the men gave written informed consent. We assessed efficacy by using the responses to question 3 (frequency of penetration) and question 4 (maintenance of erections after penetration) of the 15-question International Index of Erectile Function, a validated, multidimensional, self-administered questionnaire used for the clinical assessment of erectile dysfunction and treatment outcomes in clinical studies.11 The responses to these two questions pertaining to the ability to achieve and maintain an erection sufficient for sexual intercourse, as described in the definition of erectile dysfunction,1 were rated on a scale of 1 (almost never or never) to 5 (almost always or always). A score of 0 indicated no attempt at sexual intercourse. The mean score for each of the two questions was 4.3 for 109 normal men, 31 to 86 years old, with an age distribution similar to that of the men with erectile dysfunction (unpublished data). Efficacy was also assessed on the basis of the scores for the five separate response domains of male sexual function of the International Index13: erectile function (questions 1 through 5 and 15; possible total score, 1 to 30); orgasmic function (questions 9 and 10; possible total score, 0 to 10); sexual desire (questions 11 and 12; possible total score, 2 to 10); intercourse satisfaction (questions 6, 7, and 8; possible total score, 0 to 15); and overall satisfaction (questions 13 and 14; possible total score, 2 to 10). The domain scores were computed by adding the scores for the individual questions in each domain.