Proper Storage and Handling of Sildenafil Tablets
There is a potential for cardiac risk of sexual activity in patients with preexisting cardiovascular disease.
| Brand Name | Approximate Price per Pack | Availability | Notes |
|---|---|---|---|
| Viagra (Pfizer) | $30-$60 for 4 tablets | Widely available online and pharmacies | Brand-name, prescription required |
| Generic Sildenafil | $10-$20 for 4 tablets | Over-the-counter or prescription | Often more affordable |
| Local pharmacies | Varies | Market dependent | Check quality and authenticity |
| Online vendors | Varies | Ensure pharmacy legitimacy | Beware of counterfeit products |
[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. [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.
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Sildenafil should be used with caution in patients with retinitis pigmentosa, a retinal disorder that may be accompanied by a genetic disorder of retinal phosphodiesterases in some patients, since data establishing the safety and efficacy of the drug in these patients currently are lacking. Sudden decrease or loss of hearing, with or without concomitant vestibular manifestations (e.g., tinnitus, dizziness), has been reported in temporal association with use of PDE type 5 chew sildenafil inhibitors, including sildenafil. [1] It is unclear whether these otic effects are directly related to PDE type 5 inhibitors or attributed to other underlying risk factors for hearing loss, a combination of these factors, or to other factors. Patients should discontinue sildenafil and seek medical attention immediately if sudden hearing loss or decreased hearing occurs. Prolonged erection (exceeding 4 hours) and priapism (painful erection exceeding 6 hours) have been reported infrequently during postmarketing surveillance with sildenafil.
The Bottom Line
[1][31][127][131][139][146][147] Because of the risk of penile tissue damage and permanent loss of potency if priapism is not treated immediately, patients should be warned to seek immediate medical attention if an erection persists for longer than 4 hours. Sildenafil should be used with caution in patients with anatomic deformation of the penis (such as angulation, cavernosal fibrosis, or Peyronie's disease) and in patients who have conditions that may predispose them to priapism (e.g., sickle cell anemia, multiple myeloma, leukemia). Caution is advised when PDE type 5 inhibitors are co-administered with α-adrenergic blocking agents; blood pressure may be lowered significantly and in some patients, symptomatic hypotension (e.g., dizziness, lightheadedness, fainting) may occur. [1] Patients who demonstrate hemodynamic instability during therapy with an α-adrenergic blocking agent alone are at increased risk for symptomatic pfizer sildenafil 100 hypotension with concomitant use of a PDE type 5 inhibitor. In patients who exhibit hemodynamic instability while receiving an α-adrenergic blocking agent, use caution. [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.
- 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.
[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.
| 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 |
[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.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Viagra Generic | 50mg | 30 + 4 Pills | 54.26€ 51.68€ | |
| Viagra Generic | 200mg | 20 Pills | 61.69€ 58.75€ | |
| Kamagra Polo | 100mg | 120 + 6 Pills | 327.15€ 311.57€ | |
| Kamagra | 100mg | 32 Pills | 121.24€ 115.47€ | |
| Viagra Generic | 200mg | 360 + 10 Pills | 481.98€ 459.03€ | |
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| Viagra Generic | 100mg | 30 + 4 Pills | 60.91€ 58.01€ | |
| Viagra Generic | 150mg | 10 Pills | 36.73€ 34.98€ | |
| Viagra Generic | 50mg | 120 + 6 Pills | 129.64€ 123.47€ | |
| Viagra Generic | 25mg | 180 + 6 Pills | 154.93€ 147.55€ | |
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[1] A risk estimate of 2.27 was reported in a similar study. Causality assessment is difficult because of the small number of events, the large number of patients receiving PDE type 5 inhibitors, the occurrence of optic neuropathy in a similar population of individuals who have not been exposed to PDE type 5 inhibitors, and plausible alternative causes (e.g., vascular risk factors, anatomic defects). If sudden vision loss or decreased vision occurs in one or both eyes while a patient is receiving a PDE type 5 inhibitor, the patient should discontinue the drug and contact a clinician immediately. Clinicians should discuss the increased risk of NAION with patients who have already experienced NAION in one eye, including whether such individuals could be adversely affected by use of vasodilators, such as PDE type 5 inhibitors. [1] Sildenafil should be used with caution for the treatment of ED in these patients and only when the anticipated benefits outweigh the risks. Although at greater risk for NAION compared to the general population, evidence is insufficient to support screening for "crowded" optic disc in prospective users of PDE type 5 inhibitors for the treatment of ED. Sildenafil should be used with caution in patients with retinitis pigmentosa, a retinal disorder that may be accompanied by a genetic disorder of retinal phosphodiesterases in some patients, since data establishing the safety and efficacy of the drug in these patients currently are lacking. Sudden decrease or loss of hearing, with or without concomitant vestibular manifestations (e.g., tinnitus, dizziness), has been reported in temporal association with use of PDE type 5 chew sildenafil inhibitors, including sildenafil. [1] It is unclear whether these otic effects are directly related to PDE type 5 inhibitors or attributed to other underlying risk factors for hearing loss, a combination of these factors, or to other factors. Patients should discontinue sildenafil and seek medical attention immediately if sudden hearing loss or decreased hearing occurs. Prolonged erection (exceeding 4 hours) and priapism (painful erection exceeding 6 hours) have been reported infrequently during postmarketing surveillance with sildenafil.
- Sildenafil 50 mg works best with sexual arousal.
- Do not take it with other ED medications simultaneously.
- Keep hydrated but avoid excessive alcohol intake.
- The drug is not a cure but manages symptoms.
- Some users may experience nasal congestion.
- Stay informed about possible interactions with supplements.
- Do not use expired medication.
- Follow up with your doctor for ongoing assessment.
[1][31][127][131][139][146][147] Because of the risk of penile tissue damage and permanent loss of potency if priapism is not treated immediately, patients should be warned to seek immediate medical attention if an erection persists for longer than 4 hours. Sildenafil should be used with caution in patients with anatomic deformation of the penis (such as angulation, cavernosal fibrosis, or Peyronie's disease) and in patients who have conditions that may predispose them to priapism (e.g., sickle cell anemia, multiple myeloma, leukemia). Caution is advised when PDE type 5 inhibitors are co-administered with α-adrenergic blocking agents; blood pressure may be lowered significantly and in some patients, symptomatic hypotension (e.g., dizziness, lightheadedness, fainting) may occur. [1] Patients who demonstrate hemodynamic instability during therapy with an α-adrenergic blocking agent alone are at increased risk for symptomatic pfizer sildenafil 100 hypotension with concomitant use of a PDE type 5 inhibitor.
Reviews for Sildenafil
[1] Patients should be stable on an α-adrenergic blocking agent prior to initiation of sildenafil, and sildenafil should be administered at the lowest possible dose. [1] In patients receiving an optimal dose of sildenafil, initiate the α-adrenergic blocking agent at the lowest dose. Concomitant administration of ritonavir substantially increases serum concentrations of sildenafil (11-fold increase in AUC). [1] Data are limited; decreased blood pressure, syncope, and prolonged erection have been reported in some healthy volunteers exposed to high doses of sildenafil (200-800 mg). [1] Use sildenafil with caution in patients receiving ritonavir; reduced sildenafil dosage is recommended to decrease the chance of adverse reactions to sildenafil.
If you take more than the recommended amount of Viagra
Bleeding events have been reported in patients taking sildenafil for ED. [1] In patients with bleeding disorders or active peptic ulcers, sildenafil should be used with caution since safety of the drug has not been established. [1][27][33][67][131] The possibility that sildenafil could potentiate the effects of certain other drugs exhibiting antiplatelet activity should be considered. Safety and efficacy have not been established for use of sildenafil in combination with other PDE type 5 inhibitors or other treatments for ED; such combinations may further lower blood pressure and are not recommended. Patients should be advised that use of sildenafil provides no protection against sexually transmitted diseases and they should be counseled regarding protective measures to guard against such transmission. In patients who exhibit hemodynamic instability while receiving an α-adrenergic blocking agent, use caution. [1] Patients should be stable on an α-adrenergic blocking agent prior to initiation of sildenafil, and sildenafil should be administered at the lowest possible dose. [1] In patients receiving an optimal dose of sildenafil, initiate the α-adrenergic blocking agent at the lowest dose. Concomitant administration of ritonavir substantially increases serum concentrations of sildenafil (11-fold increase in AUC).
Comparing Which Lasts Longer
Sildenafil for ED (e.g., Viagra®) is not indicated for use in females. [1] There are no data with use in pregnant women to inform any drug-associated risks for adverse developmental outcomes. No evidence of teratogenicity, embryotoxicity, or fetotoxicity was observed in rats and rabbits receiving up to 200 mg/kg daily of sildenafil during organogenesis. [1] These doses in rats and rabbits represent about 16 and 32 times, respectively, the maximum recommended human dose (MRHD) for the treatment of ED on a mg/m2 basis in a 50-kg patient. [1] No adverse effects were observed Iin a prenatal and postnatal development study in rats receiving 30 mg/kg daily for 36 days (equivalent to 2-times the MRHD on a mg/m2 basis in a 50-kg subject).
Regional issues
[1] Limited data indicate that sildenafil and its active metabolite are present in human milk. [1] There is no information about the effects of sildenafil on the breastfed infant or on milk production. Reproduction studies revealed no evidence of impaired fertility at sildenafil dosages up to 60 mg/kg daily (for 36 days in female rats and 102 days in male rats), a dosage representing more than 25 times the human male AUC. [1] No effect on sperm motility or morphology was noted after a single 100-mg oral sildenafil dose in healthy human adults. Sildenafil for ED (e.g., Viagra®) is not indicated for use in pediatric patients. [1] Data are limited; decreased blood pressure, syncope, and prolonged erection have been reported in some healthy volunteers exposed to high doses of sildenafil (200-800 mg). [1] Use sildenafil with caution in patients receiving ritonavir; reduced sildenafil dosage is recommended to decrease the chance of adverse reactions to sildenafil. Bleeding events have been reported in patients taking sildenafil for ED. [1] In patients with bleeding disorders or active peptic ulcers, sildenafil should be used with caution since safety of the drug has not been established. [1][27][33][67][131] The possibility that sildenafil could potentiate the effects of certain other drugs exhibiting antiplatelet activity should be considered. Safety and efficacy have not been established for use of sildenafil in combination with other PDE type 5 inhibitors or other treatments for ED; such combinations may further lower blood pressure and are not recommended. Patients should be advised that use of sildenafil provides no protection against sexually transmitted diseases and they should be counseled regarding protective measures to guard against such transmission.
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There is a potential for cardiac risk of sexual activity in 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.
How Sildenafil Works to Treat ED
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. [28][67][159] In patients with severe renal impairment, concomitant use of sildenafil and antihypertensive agents should be undertaken with caution. Sildenafil for ED (e.g., Viagra®) is not indicated for use in females.
- Always take sildenafil with a full glass of water.
- Use the medication responsibly to avoid dependency.
- Do not share your medication with others.
- Regular check-ups are recommended during use.
- Report any vision or hearing disturbances immediately.
- Use caution if combining with antihypertensive drugs.
- It is not intended for use in erectile enhancement alone.
- Follow legal and medical guidelines for purchase.
[1] There are no data with use in pregnant women to inform any drug-associated risks for adverse developmental outcomes. No evidence of teratogenicity, embryotoxicity, or fetotoxicity was observed in rats and rabbits receiving up to 200 mg/kg daily of sildenafil during organogenesis. [1] These doses in rats and rabbits represent about 16 and 32 times, respectively, the maximum recommended human dose (MRHD) for the treatment of ED on a mg/m2 basis in a 50-kg patient. [1] No adverse effects were observed Iin a prenatal and postnatal development study in rats receiving 30 mg/kg daily for 36 days (equivalent to 2-times the MRHD on a mg/m2 basis in a 50-kg subject). [1] Limited data indicate that sildenafil and its active metabolite are present in human milk. [1] There is no information about the effects of sildenafil on the breastfed infant or on milk production. Reproduction studies revealed no evidence of impaired fertility at sildenafil dosages up to 60 mg/kg daily (for 36 days in female rats and 102 days in male rats), a dosage representing more than 25 times the human male AUC. [1] No effect on sperm motility or morphology was noted after a single 100-mg oral sildenafil dose in healthy human adults. Sildenafil for ED (e.g., Viagra®) is not indicated for use in pediatric patients.
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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. [1] A risk estimate of 2.27 was reported in a similar study.
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Causality assessment is difficult because of the small number of events, the large number of patients receiving PDE type 5 inhibitors, the occurrence of optic neuropathy in a similar population of individuals who have not been exposed to PDE type 5 inhibitors, and plausible alternative causes (e.g., vascular risk factors, anatomic defects). If sudden vision loss or decreased vision occurs in one or both eyes while a patient is receiving a PDE type 5 inhibitor, the patient should discontinue the drug and contact a clinician immediately. Clinicians should discuss the increased risk of NAION with patients who have already experienced NAION in one eye, including whether such individuals could be adversely affected by use of vasodilators, such as PDE type 5 inhibitors. [1] Sildenafil should be used with caution for the treatment of ED in these patients and only when the anticipated benefits outweigh the risks. Although at greater risk for NAION compared to the general population, evidence is insufficient to support screening for "crowded" optic disc in prospective users of PDE type 5 inhibitors for the treatment of ED.