Sildenafil tablets should be used with caution, and only when the anticipated benefits outweigh the risks, in patients with a history of NAION.
- Sildenafil 25mg may be less potent than higher doses but still effective.
- Confirm your dosage with your healthcare provider regularly.
- Do not use sildenafil if you are allergic to it.
- Check for contraindications such as severe liver or kidney disease.
- Alcohol may diminish the medication’s effectiveness.
- Follow prescribed timing for best results and safety.
Patients with a "crowded" optic disc may also be at an increased risk of NAION.
What should I know about storage and disposal of this medication?
^ "Is Viagra about to lose its pulling power in the UK?". Archived from the original on 30 October 2013. Archived from the original on 22 August 2009. Archived from the original on 25 June 2007. "Viagra from the pharmacist: insight from reclassification in New Zealand".
How should I store sildenafil?
Archived from the original on 17 May 2021. ^ "Generic Viagra developers queue up, but may have to wait". Archived from the original on 28 December 2021. ^ "Approved Viagra copies flood drugstores in Korea". ^ "Viagra prescriptions almost triple in a decade". ( 5.3)Patients should stop sildenafil tablets and seek prompt medical attention in the event of sudden decrease or loss of hearing ( 5.4)Caution is advised when sildenafil tablets is co-administered with alpha-blockers or anti- hypertensives.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Viagra Generic | 150mg | 120 + 8 Pills | 177.58€ 169.12€ | |
| Viagra Generic | 50mg | 10 Pills | 26.87€ 25.59€ | |
| Kamagra Soft Tabs | 100mg | 180 + 8 Pills | 425.45€ 405.19€ | |
| Viagra Generic | 50mg | 180 + 8 Pills | 158.82€ 151.26€ | |
| Kamagra | 100mg | 84 + 6 Pills | 264.44€ 251.85€ | |
| Viagra Generic | 200mg | 90 + 6 Pills | 170.79€ 162.66€ | |
| Viagra Generic | 50mg | 20 Pills | 40.52€ 38.59€ | |
| Viagra Generic | 200mg | 10 Pills | 40.96€ 39.01€ | |
| Viagra Generic | 200mg | 20 Pills | 61.69€ 58.75€ | |
| Kamagra | 100mg | 12 Pills | 55.64€ 52.99€ | |
| Kamagra Oral Jelly | 100mg | 63 + 7 Sachets | 224.18€ 213.50€ | |
| Viagra Generic | 200mg | 120 + 8 Pills | 204.80€ 195.05€ | |
| Viagra Generic | 200mg | 30 + 2 Pills | 83.07€ 79.11€ | |
| Viagra Generic | 150mg | 90 + 6 Pills | 147.18€ 140.17€ | |
| Kamagra | 100mg | 120 + 6 Pills | 330.74€ 314.99€ | |
| Kamagra Polo | 100mg | 180 + 8 Pills | 446.52€ 425.26€ |
Concomitant use may lead to hypotension ( 5.5)Decreased blood pressure, syncope, and prolonged erection may occur at higher sildenafil exposures.
Are erectile dysfunction medicines safe?
Archived from the original on 30 November 2012. Archived from the original on 27 December 2013. "In rare move, Pfizer asks Supreme Court to reconsider ruling that killed Viagra patent". Archived from the original on 5 February 2013. "The Supreme Court of Canada holds Pfizer's Viagra patent invalid".
Mechanism of Action
Archived from the original on 20 May 2013. ^ "Actavis Launches Generic Viagra in Europe as Patents Expire". Archived from the original on 29 October 2013. "What Will Happen When Viagra Goes Generic?". Archived from the original on 23 April 2011. In patients taking strong CYP inhibitors, such as ritonavir, sildenafil exposure is increased.
| Region | Typical Cost per 25mg Tablet | Available Brands | Purchasing Points |
|---|---|---|---|
| USA | $0.50 - $1.50 | Viagra, Kamagra, generics | Pharmacies, online stores |
| Europe | €0.40 - €1.20 | Sildenafil brands | Pharmacists, online |
| Asia | $0.20 - $0.80 | Local generic brands | Local pharmacies |
Decrease in sildenafil tablets dosage is recommended ( 2.4, 5.6)ADVERSE REACTIONSMost common adverse reactions (≥ 2%) include headache, flushing, dyspepsia, abnormal vision,nasal congestion, back pain, myalgia, nausea, dizziness and rash ( 6.1)To report SUSPECTED ADVERSE REACTIONS, contact Advagen Pharma Ltd, at 866-488-0312 or FDA at 1-800-FDA-1088 or INTERACTIONSSildenafil can potentiate the hypotensive effects of nitrates, alpha blockers, and anti- hypertensives ( 4.1, 5.5, 7.1, 7.2, 7.3, 12.2)With concomitant use of alpha blockers, initiate sildenafil
| Aspect | Details | Notes |
|---|---|---|
| Generic Name | Sildenafil citrate | Active ingredient |
| Brand Names | Viagra, Kamagra, others | Marketed under various names |
| Tablet Strength | 25 mg | Dosage per tablet |
| Form | Oral tablet | Administration form |
| Manufacturer | Various pharmaceutical companies | Production sources |
at 25 mg dose ( 2.3)CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, itraconazole, erythromycin): Increase sildenafil exposure ( 2.4, 7.4, 12.3)USE IN SPECIFIC POPULATIONSSee 17 for PATIENT COUNSELING INFORMATION and FDA-approved patient labeling.Revised: 1/2026 Warnings and Precautions, Effects on the Eye ( 5.3) Sildenafil tablets are phosphodiesterase-5 (PDE5) inhibitor indicated for the treatment of erectile dysfunction (ED) ( 1) For most patients, the recommended dose is 50 mg taken, as needed, approximately 1 hour before sexual activity.
Understanding Erectile Dysfunction (ED)
Archived from the original on 10 January 2017. "Online pharmacies suspected of counterfeit drug sales". ^ "Erectile Dysfunction Medication the Most Seized Drug During Global Crackdown, Interpol Says". ^ "Global illicit medicines targeted by INTERPOL operation". Archived from the original on 10 December 2023.
How is sildenafil supplied (dosage forms)?
^ "Israeli-made AI exposes international fake Viagra network". ^ "Counterfeit Viagra Pills, Footwear, Belts, Car Emblems and Headphones Worth over $32 Million Seized at the LA/Long Beach Seaport U.S. Customs and Border Protection". Archived from the original on 12 October 2013. "Yes, There Is a Way to Get Generic Viagra". However, sildenafil tablets may be taken anywhere from 30 minutes to 4 hours before sexual activity ( 2.1) Based on effectiveness and toleration, may increase to a maximum of 100 mg or decrease to 25 mg ( 2.1) Maximum recommended dosing frequency is once per day ( 2.1) Tablets: 25 mg, 50 mg, 100 mg ( 3) Administration of sildenafil tablets to patients using nitric oxide donors, such as organic nitrates or organic nitrites in any form.
- Sildenafil 25mg is sometimes used off-label for other conditions.
- Login into your doctor’s advice before adjusting your dose.
- Take tablets with water; avoid crushing or chewing them.
- The effects of sildenafil last from 4 to 6 hours.
- It is not an aphrodisiac and requires sexual arousal for effectiveness.
- Regular health check-ups are recommended during use.
Sildenafil tablets was shown to potentiate the hypotensive effect of nitrates ( 4.1, 7.1, 12.2) Known hypersensitivity to sildenafil or any component of tablet ( 4.2) Administration with guanylate cyclase (GC) stimulators, such as riociguat ( 4.3) Patients should not use sildenafil tablets if sexual activity is inadvisable due to cardiovascular status ( 5.1) Patients should seek emergency treatment if an erection lasts >4 hours. Use sildenafil tablets with caution in patients predisposed to priapism ( 5.2) Patients should stop sildenafil tablets and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic anterior ischemic optic neuropathy (NAION).
2. Upsides
Archived from the original on 1 July 2024. ^ "MHRA reclassifies Viagra Connect tablets to a Pharmacy medicine". ^ "Viagra to be available without prescription in UK". NDC Code(s): 72888-015-05, 72888-015-30, 72888-016-00, 72888-016-01, view more72888-016-30, 72888-017-00, 72888-017-01, 72888-017-30 If you are a consumer or patient please visit this version. HIGHLIGHTS OF PRESCRIBING INFORMATION These highlights do not include all the information needed to use SILDENAFIL TABLETS safely and effectively.
Sildenafil side effects
See full prescribing information for SILDENAFIL TABLETSSILDENAFIL tablets, for oral useInitial U.S. Approval: 1998RECENT MAJOR CHANGESWarnings and Precautions, Effects on the Eye ( 5.3)INDICATIONS AND USAGESildenafil tablets are phosphodiesterase-5 (PDE5) inhibitor indicated for the treatment of erectile dysfunction (ED) ( 1)DOSAGE AND ADMINISTRATIONFor most patients, the recommended dose is 50 mg taken, as needed, approximately 1 hour before sexual activity. However, sildenafil tablets may be taken anywhere from 30 minutes to 4 hours before sexual activity ( 2.1)Based on effectiveness and toleration, may increase to a maximum of 100 mg or decrease to 25 mg ( 2.1)Maximum recommended dosing frequency is once per day ( 2.1)DOSAGE FORMS AND STRENGTHSTablets: 25 mg, 50 mg, 100 mg ( 3)CONTRAINDICATIONSAdministration of sildenafil tablets to patients using nitric oxide donors, such as organic nitrates or organic nitrites in any form. Sildenafil tablets was shown to potentiate the hypotensive effect of nitrates ( 4.1, 7.1, 12.2)Known hypersensitivity to sildenafil or any component of tablet ( 4.2)Administration with guanylate cyclase (GC) stimulators, such as riociguat ( 4.3)WARNINGS AND PRECAUTIONSPatients should not use sildenafil tablets if sexual activity is inadvisable due to cardiovascular status ( 5.1)Patients should seek emergency treatment if an erection lasts >4 hours. Use sildenafil tablets with caution in patients predisposed to priapism ( 5.2)Patients should stop sildenafil tablets and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic anterior ischemic optic neuropathy (NAION). Patients should stop sildenafil tablets and seek prompt medical attention in the event of sudden decrease or loss of hearing ( 5.4) Caution is advised when sildenafil tablets is co-administered with alpha-blockers or anti- hypertensives.
2.2 Use with Food
Archived from the original on 2 May 2016. "Pfizer Wins Viagra Patent Infringement Case Against Teva Pharmaceuticals". Archived from the original on 11 January 2015. ^ "Pfizer Completes Transaction to Combine Its Upjohn Business with Mylan". Retrieved 17 June 2024 – via Business Wire.
How sildenafil is used
Archived from the original on 17 June 2024. "Viagra patent expires in June, says Brazilian court". Archived from the original on 17 April 2012. ^ "Revatio patent ruled invalid for lack of sound prediction and obviousness". Archived from the original on 3 March 2016. Concomitant use may lead to hypotension ( 5.5) Decreased blood pressure, syncope, and prolonged erection may occur at higher sildenafil exposures.
| Parameter | Value | Notes |
|---|---|---|
| Absorption | Rapid, within 30-60 minutes | Peak plasma levels occur at this time |
| Bioavailability | Approximately 40% | Due to first-pass metabolism |
| Half-life | 4-5 hours | Duration of effect |
| Metabolism | Liver via CYP3A4 enzyme | Variability based on liver function |
| Excretion | Mainly in feces, some in urine | Clearance mostly hepatic |
Decrease in sildenafil tablets dosage is recommended ( 2.4, 5.6) Most common adverse reactions (≥ 2%) include headache, flushing, dyspepsia, abnormal vision,nasal congestion, back pain, myalgia, nausea, dizziness and rash ( 6.1) To report SUSPECTED ADVERSE REACTIONS, contact Advagen Pharma Ltd, at 866-488-0312 or FDA at 1-800-FDA-1088 or Sildenafil can potentiate the hypotensive effects of nitrates, alpha blockers, and anti- hypertensives ( 4.1, 5.5, 7.1, 7.2, 7.3, 12.2) With concomitant use of alpha blockers, initiate sildenafil at 25 mg dose ( 2.3) CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, itraconazole, erythromycin): Increase sildenafil exposure ( 2.4, 7.4, 12.3) See 17 for PATIENT COUNSELING INFORMATION and FDA-approved patient labeling.
6. Response and effectiveness
"Why Pfizer Is About to Slash Viagra's Price in Half". Archived from the original on 7 December 2017. "Pfizer to lose patent of drug Viagra, Indian companies gear up with copycat versions: Pfizer's patent for the formulation of Viagra, used to treat impotence in men, ends in the US in 2020". Archived from the original on 17 April 2021. ^ "Set to conquer US, Indian 'Viagras' may give Pfizer a hard Time".
Jet lag research
Archived from the original on 22 December 2020. ^ a b "Pfizer Settles Viagra® Patent Litigation With Teva". "Lockout Supplements Issues Voluntary Nationwide Recall of Boner Bears Chocolate Syrup Due to Undeclared Sildenafil". Archived from the original on 19 November 2016. "Counterfeit Viagra, Cialis, Levitra: The Ultimate Guide". Table of Contents FULL PRESCRIBING INFORMATION: CONTENTS*1 INDICATIONS AND USAGE2 DOSAGE AND ADMINISTRATION2.1 Dosage Information2.2 Use with Food2.3 Dosage Adjustments in Specific Situations2.4 Dosage Adjustments Due to Drug Interactions2.5 Dosage Adjustments in Special Populations3 DOSAGE FORMS AND STRENGTHS4 CONTRAINDICATIONS4.1 Nitrates4.2 Hypersensitivity Reactions4.3 Concomitant Guanylate Cyclase (GC) Stimulators5 WARNINGS AND PRECAUTIONS5.1 Cardiovascular5.2 Prolonged Erection and Priapism5.3 Effects on the Eye5.4 Hearing Loss5.5 Hypotension when Co-administered with Alpha-blockers or Anti-hypertensives5.6 Adverse Reactions with the Concomitant Use of Ritonavir5.7 Combination with other PDE5 Inhibitors
- This dose is often prescribed for sensitive individuals or beginners.
- Sildenafil 25mg may start working within 30 minutes of ingestion.
- It’s important to follow prescribed dosage instructions carefully.
- Sildenafil can interact with medications like nitrates.
- Avoid grapefruit juice, as it can increase drug levels.
- The pill should be swallowed whole with water.
or Other Erectile Dysfunction Therapies5.8 Effects on Bleeding5.9 Counseling Patients about Sexually Transmitted Diseases6 ADVERSE REACTIONS6.1 Clinical Trials Experience6.2 Postmarketing Experience7 DRUG INTERACTIONS7.1 Nitrates7.2 Alpha-blockers7.3 Amlodipine7.4 Ritonavir and other CYP3A4 inhibitors7.5 Alcohol8 USE IN SPECIFIC POPULATIONS8.1 Pregnancy8.2 Lactation8.4 Pediatric Use8.5 Geriatric
Dosing & Uses
{{cite web}}: CS1 maint: deprecated archival service (link) ^ Teva Canada Ltd. v. Pfizer Canada Inc., 2012 SCC 60 at par. "Supreme Court ruling could lead to cheaper versions of Viagra". Archived from the original on 10 March 2013.
Professional resources
"Canadian Supreme court rules Viagra patent invalid". Archived from the original on 11 November 2012. ^ "Viagra patent sildenafil oral strips tossed out by Supreme Court: Decision allows generic versions of drug to be produced". Archived from the original on 18 September 2013. ^ "Pfizer Canada drops Viagra price after generic versions get Supreme Court green light". Use8.6 Renal Impairment8.7 Hepatic Impairment10 OVERDOSAGE11 DESCRIPTION12 CLINICAL PHARMACOLOGY12.1 Mechanism of Action12.2 Pharmacodynamics12.3 Pharmacokinetics13 NONCLINICAL TOXICOLOGY13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility14 CLINICAL STUDIES16 HOW SUPPLIED/STORAGE AND HANDLING17 PATIENT COUNSELING INFORMATION*Sections or subsections omitted from the full prescribing information are not listed.
- Use sildenafil 25mg as part of a comprehensive ED treatment plan.
- Sexual stimulation is needed for the drug to be effective.
- Do not take sildenafil if you have heart issues without consulting a doctor.
- The medication can cause a temporary vision change.
- Limit physical activity after taking the medication to avoid dizziness.
- Use with caution if you are taking blood pressure medications.
- Storage and Handling of Sildenafil Oral Liquid
- 8 USE IN SPECIFIC POPULATIONS
- 6 ADVERSE REACTIONS
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