Buying Generic Sildenafil: What You Need to Know
[33][107][130][131] Improvement in erectile function sufficient for successful intercourse can be achieved with sildenafil in a substantial percentage of patients with ED, and the strength and duration of erection achieved with the drug in such patients approached those achieved in untreated healthy men.
| Age Range | Suitability | Notes |
|---|---|---|
| 18-50 years | Usually suitable | Under doctor supervision |
| 51-70 years | Caution advised | Dose adjustment may be needed |
| Over 70 years | Use with caution | Potential drug interactions |
Sildenafil also has been effective in a limited number of men with temporary ED associated with the stress of providing a sperm sample (e.g., for intrauterine insemination or in vitro fertilization during assisted reproduction). [143] In men with a history of such temporary dysfunction, planned use of sildenafil for subsequent attempts at obtaining a sperm specimen may improve attainment of an erection adequate for self-stimulated ejaculation. While most males with ED respond to oral sildenafil therapy, treatment failures do occur; pooled data from various placebo-controlled, dose-response, or open-label studies (25-100 mg for 6-12 months) indicate that up to 5% of patients discontinued therapy because of lack of effectiveness.
Brand names
Because PDE type 5 inhibitors are administered orally, they are likely to be more acceptable to men with ED than other vasoactive therapies (e.g., intracavernosal injections, intraurethral suppositories) or mechanical or prosthetic devices. [26][33][81][94][107][602] Alternative therapies (e.g., intracavernosal or intraurethral vasoactive agents, vacuum constriction devices) may be considered for patients who fail to respond to, or are not candidates for, first-line therapy (e.g., patients who require nitrate therapy). [144][155][161][189][601] Ultimately, the choice of therapy for ED should be individualized, taking into account patient response, tolerability and safety; administration considerations, cost and sildenafil 45 mg chewable tablets patient reimbursement factors; experience and judgment of the clinician; and individual patient and partner preference, expectations, and satisfaction. [33][65][81][101][189][601][602] PDE type 5 inhibitors are effective only in the presence of adequate sexual stimulation. [1][189][602] Prior to proceeding to alternative therapies in patients reporting failure of selective PDE type 5 inhibitor therapy, an evaluation to determine whether there was an adequate trial should be undertaken.
Pulmonary hypertension
[34][104][602] Treatment failure may also be attributed to incorrect use of PDE type 5 inhibitor therapy (e.g., lack of sexual stimulation, medication taken with a large meal). [189] The possibility that another selective PDE type 5 inhibitor therapy may be effective should be considered in patients who fail an adequate trial with one drug. [189][601][602] Although differences in the pharmacokinetics of these drugs (onset and duration) may exist, data currently are insufficient to support the superiority of one selective PDE type 5 inhibitor over another. Administer sildenafil tablets orally without regard to meals; however, administration with a high-fat meal may delay the onset of action. [1] [117][131] Administer the drug approximately 1 hour before anticipated sexual activity. [1][7][33][69][93][104][107][128][131][132][163][165] Information on the long-term effects of sildenafil is limited, and thus the optimum duration of therapy is not known. [1][33][81][128][132] In clinical studies, sildenafil was used in patients ranging in age from 19-87 years of age with a duration of ED averaging 5 years. [1] In several long-term and open-label studies, sildenafil remained effective for at least 0.5-4 years, with no evidence of tachyphylaxis during long-term use, and current evidence indicates that continued therapy is necessary as long as the condition persists (i.e., sildenafil is not a cure for ED).
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Kamagra Polo | 100mg | 32 Pills | 125.88€ 119.89€ | |
| Viagra Generic | 25mg | 360 + 10 Pills | 213.68€ 203.50€ | |
| Viagra Generic | 150mg | 10 Pills | 36.73€ 34.98€ | |
| Kamagra Soft Tabs | 100mg | 120 + 6 Pills | 311.78€ 296.93€ | |
| Kamagra Soft Tabs | 100mg | 84 + 4 Pills | 233.05€ 221.95€ | |
| Viagra Generic | 50mg | 20 Pills | 40.52€ 38.59€ | |
| Viagra Generic | 200mg | 90 + 6 Pills | 170.79€ 162.66€ | |
| Kamagra Soft Tabs | 100mg | 20 Pills | 79.79€ 75.99€ | |
| Kamagra Polo | 100mg | 60 + 4 Pills | 189.39€ 180.37€ | |
| Kamagra Soft Tabs | 100mg | 180 + 8 Pills | 425.45€ 405.19€ | |
| Viagra Generic | 50mg | 270 + 8 Pills | 198.48€ 189.03€ | |
| Viagra Generic | 25mg | 30 + 4 Pills | 47.97€ 45.69€ | |
| Viagra Generic | 200mg | 180 + 10 Pills | 277.56€ 264.34€ | |
| Kamagra Soft Tabs | 100mg | 12 Pills | 57.55€ 54.81€ | |
| Viagra Generic | 200mg | 270 + 10 Pills | 379.76€ 361.68€ | |
| Kamagra | 100mg | 60 + 4 Pills | 201.34€ 191.75€ | |
| Kamagra Oral Jelly | 100mg | 10 Sachets | 54.55€ 51.95€ |
The safety and efficacy of sildenafil in combination with other treatments for ED have not been established. [1] Such combined therapy may further lower blood pressure and is not recommended by the manufacturer.
| Parameter | Value | Details |
|---|---|---|
| Absorption | Rapid, within 30-60 minutes | Food can delay absorption |
| Peak Plasma Levels | 1.5 hours after intake | |
| Half-life | Approx. 4 hours | Eliminated via liver metabolism |
| Metabolization | Liver (Cytochrome P450 enzymes) | CYP3A4 major enzyme |
With the availability of orally active and convenient vasoactive (erectogenic) therapies (e.g., selective phosphodiesterase [PDE] type 5 inhibitors such as sildenafil, tadalafil, avanafil, and vardenafil), most experts (e.g., the American Urological Association [AUA]) now consider these drugs to be first-line therapies for a broad range of patients with ED. Because PDE type 5 inhibitors are administered orally, they are likely to be more acceptable to men with ED than other vasoactive therapies (e.g., intracavernosal injections, intraurethral suppositories) or mechanical or prosthetic devices. [26][33][81][94][107][602] Alternative therapies (e.g., intracavernosal or intraurethral vasoactive agents, vacuum constriction devices) may be considered for patients who fail to respond to, or are not candidates for, first-line therapy (e.g., patients who require nitrate therapy). [144][155][161][189][601] Ultimately, the choice of therapy for ED should be individualized, taking into account patient response, tolerability and safety; administration considerations, cost and sildenafil 45 mg chewable tablets patient reimbursement factors; experience and judgment of the clinician; and individual patient and partner preference, expectations, and satisfaction.
What other information should I know?
In patients with hepatic impairment (e.g., cirrhosis), consider reducing the initial dose of sildenafil to 25 mg.[1] In patients with severe renal impairment (creatinine clearance <30 mL/minute), consider reducing the initial dose of sildenafil to 25 mg.[1] In patients >= 65 years of age, consider reducing the initial dose of sildenafil to 25 mg.[1] Concomitant use of organic nitrates (e.g., nitroglycerin) in any form (e.g., orally, sublingually, transmucosally, parenterally), either regularly or intermittently. There is a potential for cardiac risk of sexual activity in buy sildenafil online uk patients with preexisting cardiovascular disease. [1] Therapy for erectile dysfunction (ED), including sildenafil, generally should not be used in men for whom sexual activity is inadvisable because of their underlying cardiovascular status. [1] The evaluation of ED should include a determination of potential underlying causes and the identification of appropriate treatment following a complete medical assessment. Sildenafil doses of 25-100 mg reduce the maximum supine systolic/diastolic blood pressure by an average of about 8.4/5.5 mm Hg within 1-2 hours after administration of the drug in healthy adults, returning to baseline values within 4-8 hours after a dose.
Viagra Tablets
Clinicians should consider whether patients with underlying cardiovascular disease could be affected adversely by the vasodilatory activity of selective PDE type 5 inhibitor therapy, especially in combination with sexual activity. Because there are no controlled clinical data establishing the safety and efficacy of sildenafil in the following subpopulations of patients with ED, the drug should be used with caution in those with a recent (within 6 months) myocardial infarction, stroke, or life-threatening arrhythmia; in those with resting hypotension (blood pressure less than 90/50 mm Hg) or hypertension (blood pressure exceeding 170/110 mm Hg); and in those with cardiac failure or coronary artery disease causing unstable angina. [1][31][101][127][144][154][155][159] The possibility of a hypotensive reaction in patients receiving a selective PDE type 5 inhibitor concomitantly with antihypertensive drug therapy should be considered. [28][31][67] The risk of an undesired hypotensive response is of particular concern in patients with congestive heart failure and a borderline low blood volume and low blood pressure status as well as in patients with left-ventricular outflow obstruction (e.g., aortic stenosis, idiopathic hypertrophic subaortic stenosis), those with severely impaired autonomic control of blood pressure, and in those who are receiving a complex, multidrug antihypertensive regimen. [1][67] Some experts state that monitoring of blood pressure during initiation of sildenafil therapy may be useful in identifying patients who may have an undesirable hypotensive response to the drug and is recommended for patients receiving a multidrug antihypertensive regimen and in those with congestive heart failure who have a borderline low blood volume because of concern about the potential consequences on blood pressure. [33][65][81][101][189][601][602] PDE type 5 inhibitors are effective only in the presence of adequate sexual stimulation. [1][189][602] Prior to proceeding to alternative therapies in patients reporting failure of selective PDE type 5 inhibitor therapy, an evaluation to determine whether there was an adequate trial should be undertaken.
Why is this medication prescribed?
[1][28][33][81][91][93][94][102][105][118][130][132][161][602][603] Sexual stimulation is required for response to therapy. Sildenafil tablets should be stored at 20-25°C (excursions permitted to 15-30°C). For the treatment of erectile dysfunction (ED), the recommended initial dosage of sildenafil is 50 mg orally as needed approximately 1 hour before anticipated sexual activity. [1][28][33][81][91][93][94][102][105][118][130][132][161] The maximum recommended dosing frequency is once per day. [1] The dose may be taken anywhere from 4 hours to 30 minutes before sexual activity.
Revatio for Oral Suspension
[1] Peak plasma concentrations are achieved within 30-120 minutes (median 60 minutes) when taken on an empty stomach; the erectile response is diminished at 4 hours compared with 2 hours after administration. Based on effectiveness and tolerance, the dose subsequently may be increased to a maximum recommended dose of 100 mg or decreased to 25 mg (maximum frequency once per day). [1][28][33][91][93][94][105][161] Evidence from dose-ranging studies indicates that erectile response is greater at 50- or 100-mg doses than at 25 mg.[1][28][33][130][131] Dosage of sildenafil, including both the dose and frequency of use, must be individualized carefully according to the patient's tolerance and erectile response. Concomitant use with protease inhibitors (e.g., ritonavir): An initial sildenafil dose of 25 mg is recommended in patients receiving protease inhibitors. [1][200] When used concomitantly, do not exceed a maximum single sildenafil dose of 25 mg in a 48 hour period and monitor for adverse effects. [34][104][602] Treatment failure may also be attributed to incorrect use of PDE type 5 inhibitor therapy (e.g., lack of sexual stimulation, medication taken with a large meal).
| Condition | Effect | Notes |
|---|---|---|
| Pulmonary Arterial Hypertension | Vasodilation benefits | Under medical supervision |
| Raynaud’s Phenomenon | Improved blood flow | Off-label, consult specialist |
| Altitude Sickness | Potential blood flow enhancement | Less proven, caution advised |
[189] The possibility that another selective PDE type 5 inhibitor therapy may be effective should be considered in patients who fail an adequate trial with one drug. [189][601][602] Although differences in the pharmacokinetics of these drugs (onset and duration) may exist, data currently are insufficient to support the superiority of one selective PDE type 5 inhibitor over another.
- Sildenafil helps improve erections by relaxing penile muscles.
- The drug's popularity increased rapidly after approval in the late 1990s.
- It is part of a class of medications called PDE5 inhibitors.
- Sildenafil's development marked a breakthrough for men's health.
- There are ongoing studies to expand sildenafil's therapeutic uses.
- Regular medical check-ups are advised for long-term sildenafil use.
- Generic sildenafil has made treatment more affordable worldwide.
- It’s crucial to adhere to prescribed doses to avoid adverse effects.
- The medication is often taken about 30 minutes before sexual activity.
- Using sildenafil responsibly can improve quality of life for many men.
Administer sildenafil tablets orally without regard to meals; however, administration with a high-fat meal may delay the onset of action. [1] [117][131] Administer the drug approximately 1 hour before anticipated sexual activity. [1][28][33][81][91][93][94][102][105][118][130][132][161][602][603] Sexual stimulation is required for response to therapy. Sildenafil tablets should be stored at 20-25°C (excursions permitted to 15-30°C).
How Viagra Works
[28][67][159] In patients with severe renal impairment, concomitant use of sildenafil and antihypertensive agents should be undertaken with caution. Nonarteritic anterior ischemic optic neuropathy (NAION), a cause of decreased vision including permanent loss of vision, has been reported rarely during postmarketing experience in temporal association with use of all PDE type 5 inhibitors for the treatment of ED. [1][190][191][192][196][197] Most, but not all, of these patients had underlying anatomic or vascular risk factors for the development of NAION, including but not limited to low cup-to-disc ratio (''crowded" optic disc), age (older than 50 years), diabetes mellitus, hypertension, coronary artery disease, hyperlipidemia, and smoking. [1][191][192][196] Available data suggest that the annual incidence of NAION in the general population of men 50 years of age or older is 2.5-11.8 cases per 100,000. [1] Results of an observational study in patients with recent, episodic PDE type 5 inhibitor use (typical of ED treatment) suggest an approximately two-fold increase in the risk of NAION, with a risk estimate of 2.15 within 5 half-lives of such use.
Azole Antifungals
For the treatment of erectile dysfunction (ED), the recommended initial dosage of sildenafil is 50 mg orally as needed approximately 1 hour before anticipated sexual activity. [1][28][33][81][91][93][94][102][105][118][130][132][161] The maximum recommended dosing frequency is once per day. [1] The dose may be taken anywhere from 4 hours to 30 minutes before sexual activity.
- Sildenafil has been shown to aid men with diabetes-related ED.
- The drug may also reduce blood pressure temporarily.
- Some men may not respond to sildenafil due to various health factors.
- It is recommended to take sildenafil on an empty stomach for faster effects.
- Overdose symptoms include dizziness, fainting, and pain in the chest.
- Sildenafil should not be used with other erectile dysfunction medications simultaneously.
- Patients should inform their doctor if they experience prolonged erections.
- Certain medical conditions require cautious use of sildenafil.
- The medication can sometimes cause changes in color perception.
- Always check the expiration date before using sildenafil pills.
[1] Peak plasma concentrations are achieved within 30-120 minutes (median 60 minutes) when taken on an empty stomach; the erectile response is diminished at 4 hours compared with 2 hours after administration. Based on effectiveness and tolerance, the dose subsequently may be increased to a maximum recommended dose of 100 mg or decreased to 25 mg (maximum frequency once per day). [1][28][33][91][93][94][105][161] Evidence from dose-ranging studies indicates that erectile response is greater at 50- or 100-mg doses than at 25 mg.[1][28][33][130][131] Dosage of sildenafil, including both the dose and frequency of use, must be individualized carefully according to the patient's tolerance and erectile response. Concomitant use with protease inhibitors (e.g., ritonavir): An initial sildenafil dose of 25 mg is recommended in patients receiving protease inhibitors. [1][200] When used concomitantly, do not exceed a maximum single sildenafil dose of 25 mg in a 48 hour period and monitor for adverse effects. In patients with hepatic impairment (e.g., cirrhosis), consider reducing the initial dose of sildenafil to 25 mg.[1] In patients with severe renal impairment (creatinine clearance <30 mL/minute), consider reducing the initial dose of sildenafil to 25 mg.[1] In patients >= 65 years of age, consider reducing the initial dose of sildenafil to 25 mg.[1] Concomitant use of organic nitrates (e.g., nitroglycerin) in any form (e.g., orally, sublingually, transmucosally, parenterally), either regularly or intermittently. There is a potential for cardiac risk of sexual activity in buy sildenafil online uk patients with preexisting cardiovascular disease. [1] Therapy for erectile dysfunction (ED), including sildenafil, generally should not be used in men for whom sexual activity is inadvisable because of their underlying cardiovascular status. [1] The evaluation of ED should include a determination of potential underlying causes and the identification of appropriate treatment following a complete medical assessment. Sildenafil doses of 25-100 mg reduce the maximum supine systolic/diastolic blood pressure by an average of about 8.4/5.5 mm Hg within 1-2 hours after administration of the drug in healthy adults, returning to baseline values within 4-8 hours after a dose. Clinicians should consider whether patients with underlying cardiovascular disease could be affected adversely by the vasodilatory activity of selective PDE type 5 inhibitor therapy, especially in combination with sexual activity. Because there are no controlled clinical data establishing the safety and efficacy of sildenafil in the following subpopulations of patients with ED, the drug should be used with caution in those with a recent (within 6 months) myocardial infarction, stroke, or life-threatening arrhythmia; in those with resting hypotension (blood pressure less than 90/50 mm Hg) or hypertension (blood pressure exceeding 170/110 mm Hg); and in those with cardiac failure or coronary artery disease causing unstable angina. [1][31][101][127][144][154][155][159] The possibility of a hypotensive reaction in patients receiving a selective PDE type 5 inhibitor concomitantly with antihypertensive drug therapy should be considered.
What should I do if I forget a dose?
[28][31][67] The risk of an undesired hypotensive response is of particular concern in patients with congestive heart failure and a borderline low blood volume and low blood pressure status as well as in patients with left-ventricular outflow obstruction (e.g., aortic stenosis, idiopathic hypertrophic subaortic stenosis), those with severely impaired autonomic control of blood pressure, and in those who are receiving a complex, multidrug antihypertensive regimen.
- Sildenafil is a phosphodiesterase type 5 (PDE5) inhibitor.
- The drug was first approved by the FDA in 1998.
- It can be purchased online but requires a prescription in most countries.
- Generic versions of sildenafil are typically cheaper than brand-name Viagra.
- Proper storage involves keeping it at room temperature away from moisture.
- Sildenafil does not protect against sexually transmitted diseases.
- Lifestyle changes like exercise and healthy eating can enhance results.
- Combining sildenafil with other ED treatments should be discussed with a doctor.
- It's important to inform your doctor about all medications you take.
- Sildenafil is not an aphrodisiac and requires sexual stimulation to work.
[1][67] Some experts state that monitoring of blood pressure during initiation of sildenafil therapy may be useful in identifying patients who may have an undesirable hypotensive response to the drug and is recommended for patients receiving a multidrug antihypertensive regimen and in those with congestive heart failure who have a borderline low blood volume because of concern about the potential consequences on blood pressure. [28][67][159] In patients with severe renal impairment, concomitant use of sildenafil and antihypertensive agents should be undertaken with caution.
Conclusion: Is Sildenafil Right for You?
Nonarteritic anterior ischemic optic neuropathy (NAION), a cause of decreased vision including permanent loss of vision, has been reported rarely during postmarketing experience in temporal association with use of all PDE type 5 inhibitors for the treatment of ED. [1][190][191][192][196][197] Most, but not all, of these patients had underlying anatomic or vascular risk factors for the development of NAION, including but not limited to low cup-to-disc ratio (''crowded" optic disc), age (older than 50 years), diabetes mellitus, hypertension, coronary artery disease, hyperlipidemia, and smoking.
Before taking this medicine
[33][107][130][131] Improvement in erectile function sufficient for successful intercourse can be achieved with sildenafil in a substantial percentage of patients with ED, and the strength and duration of erection achieved with the drug in such patients approached those achieved in untreated healthy men. Sildenafil also has been effective in a limited number of men with temporary ED associated with the stress of providing a sperm sample (e.g., for intrauterine insemination or in vitro fertilization during assisted reproduction). [143] In men with a history of such temporary dysfunction, planned use of sildenafil for subsequent attempts at obtaining a sperm specimen may improve attainment of an erection adequate for self-stimulated ejaculation. While most males with ED respond to oral sildenafil therapy, treatment failures do occur; pooled data from various placebo-controlled, dose-response, or open-label studies (25-100 mg for 6-12 months) indicate that up to 5% of patients discontinued therapy because of lack of effectiveness. [1][7][33][69][93][104][107][128][131][132][163][165] Information on the long-term effects of sildenafil is limited, and thus the optimum duration of therapy is not known.
What are some other side effects of this drug?
[1][33][81][128][132] In clinical studies, sildenafil was used in patients ranging in age from 19-87 years of age with a duration of ED averaging 5 years. [1] In several long-term and open-label studies, sildenafil remained effective for at least 0.5-4 years, with no evidence of tachyphylaxis during long-term use, and current evidence indicates that continued therapy is necessary as long as the condition persists (i.e., sildenafil is not a cure for ED). The safety and efficacy of sildenafil in combination with other treatments for ED have not been established. [1] Such combined therapy may further lower blood pressure and is not recommended by the manufacturer. With the availability of orally active and convenient vasoactive (erectogenic) therapies (e.g., selective phosphodiesterase [PDE] type 5 inhibitors such as sildenafil, tadalafil, avanafil, and vardenafil), most experts (e.g., the American Urological Association [AUA]) now consider these drugs to be first-line therapies for a broad range of patients with ED. [1][191][192][196] Available data suggest that the annual incidence of NAION in the general population of men 50 years of age or older is 2.5-11.8 cases per 100,000.
- Sildenafil is available in different strengths to tailor treatment.
- It is often used in clinical settings for ED diagnosis and management.
- Men taking sildenafil should avoid heavy meals shortly before dosing.
- The drug's effectiveness can be influenced by age and overall health.
- Combining sildenafil with recreational drugs can be dangerous.
- Some users report that sildenafil enhances spontaneous sexual activity.
- It is important to only use sildenafil that has been prescribed by a healthcare provider.
- The medication’s cost varies based on brand, dosage, and pharmacy.
- Sildenafil may cause transient eye color changes due to blood vessel effects.
- Patients should keep track of dosage and side effects experienced.
[1] Results of an observational study in patients with recent, episodic PDE type 5 inhibitor use (typical of ED treatment) suggest an approximately two-fold increase in the risk of NAION, with a risk estimate of 2.15 within 5 half-lives of such use.