^ "Revatio patent ruled invalid for lack of sound prediction and obviousness". Archived from the original on 3 March 2016.
6.1 Clinical Trials Experience
"Sex, Drugs and That Little Blue Pill". Archived from the original on 6 December 2017. "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".
What should I do if I accidentally use too much sildenafil?
Archived from the original on 17 April 2021. ^ "Set to conquer US, Indian 'Viagras' may give Pfizer a hard Time". 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". {{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.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Viagra Generic | 100mg | 120 + 6 Pills | 149.50€ 142.38€ | |
| Viagra Generic | 25mg | 90 + 6 Pills | 105.03€ 100.03€ | |
| Viagra Generic | 25mg | 20 Pills | 37.74€ 35.94€ | |
| Viagra Generic | 25mg | 60 + 4 Pills | 71.99€ 68.56€ | |
| Kamagra Oral Jelly | 100mg | 63 + 7 Sachets | 224.18€ 213.50€ | |
| Kamagra | 100mg | 120 + 6 Pills | 330.74€ 314.99€ | |
| Kamagra Soft Tabs | 100mg | 32 Pills | 120.11€ 114.39€ | |
| Viagra Generic | 25mg | 10 Pills | 25.19€ 23.99€ | |
| Viagra Generic | 200mg | 270 + 10 Pills | 379.76€ 361.68€ | |
| Viagra Generic | 25mg | 180 + 6 Pills | 154.93€ 147.55€ | |
| Kamagra Soft Tabs | 100mg | 20 Pills | 79.79€ 75.99€ | |
| Viagra Generic | 25mg | 120 + 6 Pills | 125.56€ 119.58€ | |
| Kamagra Soft Tabs | 100mg | 180 + 8 Pills | 425.45€ 405.19€ | |
| Viagra Generic | 50mg | 90 + 6 Pills | 107.37€ 102.26€ | |
| Viagra Generic | 150mg | 180 + 10 Pills | 236.46€ 225.20€ | |
| Viagra Generic | 50mg | 20 Pills | 40.52€ 38.59€ | |
| Viagra Generic | 200mg | 120 + 8 Pills | 204.80€ 195.05€ |
"Canadian Supreme court rules Viagra patent invalid".
- Sildenafil tablets are used to treat erectile dysfunction by improving blood flow to the penis.
- Common dosages of sildenafil tablets include 25mg, 50mg, and 100mg.
- Always follow a healthcare provider’s instructions when taking sildenafil tablets.
Archived from the original on 11 November 2012. ^ "Viagra patent tossed out by Supreme Court: Decision allows generic versions of drug to be produced". Archived from the original on 18 September 2013.
Other uses for this medicine
Archived from the original on 6 May 2018. Archived from the original on 9 January 2009. Archived from the original on 22 February 2021. ^ a b "Viagra now available over the counter without prescription in the UK". Archived from the original on 26 March 2021.
Behavioural Technique
Archived from the original on 8 December 2013. "The coming generics threat to Pfizer's Viagra brand just got scarier". Archived from the original on 9 September 2017. ^ "Viagra to go generic in 2017 according to Pfizer agreement". Archived from the original on 1 December 2017. ^ "Pfizer Canada drops Viagra price after generic versions get Supreme Court green light". 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".
Warnings & Precautions
Archived from the original on 12 October 2013. "Yes, There Is a Way to Get Generic Viagra". 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.
Therapies for Erectile Dysfunction
^ "Pfizer Completes Transaction to Combine Its Upjohn Business with Mylan". Retrieved 17 June 2024 – via Business Wire. Archived from the original on 17 June 2024. "Viagra patent expires in June, says Brazilian court". Archived from the original on 17 April 2012. Archived from the original on 5 February 2013. "The Supreme Court of Canada holds Pfizer's Viagra patent invalid". 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 blue sildenafil 23 April 2011. ^ "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". 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.
- Use caution when driving or operating machinery after taking sildenafil tablets.
- Avoid excessive alcohol consumption when using sildenafil tablets, as it can increase side effects.
- Consult your doctor before taking sildenafil if you have heart issues or low blood pressure.
^ "Approved Viagra copies flood drugstores in Korea". ^ "Viagra prescriptions almost triple in a decade".
Medical uses
Archived from the original on 19 November 2016. "Counterfeit Viagra, Cialis, Levitra: The Ultimate Guide". 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".
Sildenafil may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
^ "Global illicit medicines targeted by INTERPOL operation". Archived from the original on 10 December 2023. ^ "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 1 July 2024. ^ "MHRA reclassifies Viagra Connect tablets to a Pharmacy medicine". ^ "Viagra to be available without prescription in UK". 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.
| Interacting Drug / Substance | Effect | Clinical Advice |
|---|---|---|
| Nitrates | Severe hypotension | Do not combine |
| Alpha-blockers | Possible hypotension | Use with caution |
| CYP3A4 inhibitors (e.g., ketoconazole) | Increased sildenafil levels | Adjust dosage accordingly |
See full prescribing information for SILDENAFIL TABLETS.SILDENAFIL tablets, for oral useInitial U.S. Approval: 1998INDICATIONS AND USAGEAdultsSildenafil tablets are a phosphodiesterase-5 (PDE-5) inhibitor indicated for the treatment of pulmonary arterial hypertension (PAH) (World Health Organization [WHO] Group I) in adults to improve exercise ability and delay clinical worsening. (1)DOSAGE AND ADMINISTRATIONAdults: 20 mg three times a day. (2.1)DOSAGE FORMS AND STRENGTHSTablets: 20 mg (3)CONTRAINDICATIONSWARNINGS AND PRECAUTIONSVasodilation effects may be more common in patients with hypotension or on antihypertensive therapy. (5.1)Use in pulmonary veno-occlusive disease (PVOD) may cause pulmonary edema and is not recommended.
- Sildenafil tablets can be found in various brand names like Viagra and generic versions.
- The shelf life of sildenafil tablets is typically 2-3 years if stored properly.
- Take sildenafil tablets approximately one hour before sexual activity for best results.
(5.2)Hearing or visual impairment: Seek medical attention if sudden decrease or loss of vision or hearing occurs. (5.4, 5.5)Pulmonary hypertension (PH) secondary to sickle cell disease: Sildenafil citrate may cause serious vaso-occlusive crises. (5.8)ADVERSE REACTIONSDRUG INTERACTIONSUse with strong CYP3A inhibitors: Not recommended. ( 7, 12.3)Concomitant PDE-5 inhibitors: Avoid use with Viagra ®or other PDE-5 inhibitors. (5.6)Pediatric use information is approved for Viatris Specialty LLC’s, REVATIO (sildenafil) tablets. However, due to Viatris Specialty LLC’s marketing exclusivity rights, this drug product is not labeled with that information.See 17 for PATIENT COUNSELING INFORMATION and FDA-approved patient labeling.Revised: 3/2026 Sildenafil tablets are a phosphodiesterase-5 (PDE-5) inhibitor indicated for the treatment of pulmonary arterial hypertension (PAH) (World Health Organization [WHO] Group I) in adults to improve exercise ability and delay clinical worsening. Adults: 20 mg three times a day. Vasodilation effects may be more common in patients with hypotension or on antihypertensive therapy. Use in pulmonary veno-occlusive disease (PVOD) may cause pulmonary edema and is not recommended. Hearing or visual impairment: Seek medical attention if sudden decrease or loss of vision or hearing occurs. Pulmonary hypertension (PH) secondary to sickle cell disease: Sildenafil citrate may cause serious vaso-occlusive crises.
| Misconception | Reality | Explanation |
|---|---|---|
| Sildenafil cures erectile dysfunction | It does not cure, only treats symptoms | Helps achieve an erection, not a cure |
| Takes effect immediately | Usually takes 30-60 minutes | Depends on individual and food intake |
| Only for older men | Used by men of various ages | Suitable for adult men of different ages |
Use with strong CYP3A inhibitors: Not recommended.
- Sildenafil tablets are available by prescription and should not be purchased from unverified sources.
- Store sildenafil tablets at room temperature away from moisture and heat.
- Do not split or crush sildenafil tablets unless specified by a doctor.
Concomitant PDE-5 inhibitors: Avoid use with Viagra ®or other PDE-5 inhibitors. Pediatric use information is approved for Viatris Specialty LLC’s, REVATIO (sildenafil) tablets. However, due to Viatris Specialty LLC’s marketing exclusivity rights, this drug product is not labeled with that information. See 17 for PATIENT COUNSELING INFORMATION and FDA-approved patient labeling. Table of Contents FULL PRESCRIBING INFORMATION: CONTENTS*1 INDICATIONS AND USAGE2 DOSAGE AND ADMINISTRATION2.1 Recommended Dosage in Adults3 DOSAGE FORMS AND STRENGTHS4 CONTRAINDICATIONS5 WARNINGS AND PRECAUTIONS5.1 Hypotension5.2 Worsening Pulmonary Vascular Occlusive Disease5.3 Epistaxis5.4 Visual Loss5.5 Hearing Loss5.6 Combination with other PDE-5 Inhibitors5.7 Priapism5.8 Vaso-occlusive Crisis in Patients with Pulmonary Hypertension Secondary to Sickle Cell Disease6 ADVERSE REACTIONS6.1 Clinical Trials Experience6.2 Post-marketing Experience7 DRUG INTERACTIONS8 USE IN SPECIFIC POPULATIONS8.1 Pregnancy8.2 Lactation8.4 Pediatric Use8.5 Geriatric Use8.6 Patients with Hepatic Impairment8.7 Patients with Renal Impairment10 OVERDOSAGE11 DESCRIPTION12 CLINICAL PHARMACOLOGY12.1 Mechanism of Action12.2 Pharmacodynamics12.3 Pharmacokinetics13 NONCLINICAL TOXICOLOGY13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility14 CLINICAL STUDIES17 PATIENT COUNSELING INFORMATION*Sections or subsections omitted from the full prescribing information are not listed. Sections or subsections omitted from the full prescribing information are not listed. 1 INDICATIONS AND USAGE AdultsSildenafil tablets are indicated for the treatment of pulmonary arterial hypertension (PAH) (World Health Organization [WHO] Group I) in adults to improve exercise ability and delay clinical worsening [see Clinical Studies (14)] .Pediatric use information is approved for Viatris Specialty LLC’s, REVATIO (sildenafil) tablets. Sildenafil tablets are indicated for the treatment of pulmonary arterial hypertension (PAH) (World Health Organization [WHO] Group I) in adults to improve exercise ability and delay clinical worsening [see Clinical Studies (14)] . 2 DOSAGE AND ADMINISTRATION 2.1 Recommended Dosage in AdultsOral DosageThe recommended dosage of sildenafil tablet is 20 mg three times a day [see Clinical Studies (14)] .Pediatric use information is approved for Viatris Specialty LLC’s, REVATIO (sildenafil) tablets. The recommended dosage of sildenafil tablet is 20 mg three times a day [see Clinical Studies (14)] . 4 CONTRAINDICATIONS Sildenafil tablets are contraindicated in patients with:Concomitant use of organic nitrates in any form, either regularly or intermittently, because of the greater risk of hypotension [see Warnings and Precautions (5.1)] .Concomitant use of riociguat, a guanylate cyclase stimulator. Phosphodiesterase-5 (PDE-5) inhibitors, including sildenafil, may potentiate the hypotensive effects of riociguat.Known hypersensitivity to sildenafil or any component of the tablet. Hypersensitivity, including anaphylactic reaction, anaphylactic shock and anaphylactoid reaction, has been reported in association with the use of sildenafil. Sildenafil tablets are contraindicated in patients with: Concomitant use of organic nitrates in any form, either regularly or intermittently, because of the greater risk of hypotension [see Warnings and Precautions (5.1)] .