Archived from the original on 22 December 2020. ^ a b "Pfizer Settles Viagra® Patent Litigation With Teva". "Lockout Supplements Issues Voluntary Nationwide Recall of sildenafil premature ejaculation Boner Bears Chocolate Syrup Due to Undeclared Sildenafil".
12.1 Mechanism of Action
"Oral sildenafil in the treatment of erectile dysfunction. Archived from the original on 14 January 2012. "Onset and duration of action of sildenafil for the treatment of erectile dysfunction". ^ "Scientist who developed Viagra receives knighthood in New Year's Honours". Archived from the original on 14 January 2023.
More common
"Sildenafil: from angina to erectile dysfunction to pulmonary hypertension and beyond". Archived from the original on 26 September 2008. Our clinicians regularly offer patients the opportunity to take part in trials of new drugs and treatments. Morriston Hospital in Swansea, was the first in the world to trial Viagra! ^ Boolell M, Allen MJ, Ballard SA, Gepi-Attee S, Muirhead GJ, Naylor AM, et al. 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".
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Viagra Generic | 100mg | 90 + 6 Pills | 129.02€ 122.88€ | |
| Viagra Generic | 150mg | 270 + 10 Pills | 326.61€ 311.06€ | |
| Kamagra Soft Tabs | 100mg | 272 + 12 Pills | 593.42€ 565.16€ | |
| Kamagra Soft Tabs | 100mg | 84 + 4 Pills | 233.05€ 221.95€ | |
| Viagra Generic | 150mg | 30 + 2 Pills | 72.32€ 68.88€ | |
| Kamagra | 100mg | 360 + 6 Pills | 839.95€ 799.95€ | |
| Kamagra | 100mg | 60 + 4 Pills | 201.34€ 191.75€ | |
| Viagra Generic | 100mg | 30 + 4 Pills | 60.91€ 58.01€ | |
| Viagra Generic | 100mg | 120 + 6 Pills | 149.50€ 142.38€ | |
| Viagra Generic | 25mg | 90 + 6 Pills | 105.03€ 100.03€ | |
| Viagra Generic | 100mg | 360 + 10 Pills | 330.21€ 314.49€ | |
| Viagra Generic | 50mg | 20 Pills | 40.52€ 38.59€ | |
| Viagra Generic | 50mg | 180 + 8 Pills | 158.82€ 151.26€ | |
| Kamagra Polo | 100mg | 60 + 4 Pills | 189.39€ 180.37€ | |
| Kamagra Soft Tabs | 100mg | 60 + 4 Pills | 180.59€ 171.99€ | |
| Kamagra | 100mg | 32 Pills | 121.24€ 115.47€ | |
| Viagra Generic | 50mg | 30 + 4 Pills | 54.26€ 51.68€ |
^ "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.
- Common side effects include headaches and facial flushing.
- Less common effects may include nasal congestion or upset stomach.
- Do not use sildenafil if allergic to it or similar drugs.
- Pregnant women should consult a healthcare provider before use.
- Be aware of the signs of allergic reactions.
- Sildenafil may also be indicated for certain heart conditions.
- Emergency services should be contacted if adverse reactions occur.
- Keep a record of any side effects experienced.
^ "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.
MeSH terms
"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". Customs and Border Protection". 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. ^ "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. ^ "Revatio patent ruled invalid for lack of sound prediction and obviousness". Archived from the original on 3 March 2016. {{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. "Canadian Supreme court rules Viagra patent invalid". 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. ^ "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". Archived from the original on 5 February 2013.
| Storage Condition | Details | Recommended Temperature |
|---|---|---|
| Temperature | Store in a cool, dry place | 20-25°C |
| Container | Keep in original packaging to prevent moisture | Airtight container |
| Light Exposure | Protect from direct sunlight | Yes |
| Expiry Date | Check before use | Typically 2-3 years |
"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 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 pfizer sildenafil 50 the original on 25 June 2007. "Viagra from the pharmacist: insight from reclassification in New Zealand". Archived from the original on 17 May 2021.
Publication types
Viagra and Male Sexuality in Popular Culture". "A new view of women's sexual problems: Why new? Archived from the original on 3 January 2009. Archived from the original on 12 October 2008. "Sales of Impotence Drugs Fall, Defying Expectations".
What should I do if I accidentally use too much sildenafil?
Archived from the original on 11 October 2007. ^ "Pfizer Courting More Controversy with Viagra 'Advergaming'". Archived from the original on 19 December 2019. Archived from the original on 6 May 2018. Archived from the original on 9 January 2009. ^ "Generic Viagra developers queue up, but may have to wait". Archived from the original on 28 December 2021.
Preventing severe altitude illness or death
"Sildenafil: an orally active type 5 cyclic GMP-specific phosphodiesterase inhibitor for the treatment of penile erectile dysfunction". "Sildenafil (Viagra), a potent and selective inhibitor of Type 5 cGMP phosphodiesterase with utility for the treatment of male erectile dysfunction". "Drug repositioning: identifying and developing new uses for existing drugs". Archived from the original on 22 April 2019. Archived from the original on 10 June 2019.
Who should not take sildenafil?
"Health situation in former communist bloc is dire, says Unicef". Archived from the original on 1 November 2012. ^ Gurevich M, Cormier N, Leedham U, Brown-Bowers A (August 2018). Sexuopharmaceutical use by men as prevention and proficiency". "Spreading the Word, but What Word is That? ^ "Approved Viagra copies flood drugstores in Korea". ^ "Viagra prescriptions almost triple in a decade". 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 can't find what you were looking for, please contact us using one of the methods below so we can better serve you. Due to the Coronavirus (COVID-19) outbreak worldwide, the global demand for some Personal Protective Equipment (PPE) is exceeding current supply availability. In addition, the manufacturing of the PPE and many other wound care/infection prevention products have been impacted by the global response to the Coronavirus.
Key takeaways about sildenafil
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. Archived from the original on 8 December 2013. "The coming generics threat to Pfizer's Viagra brand just got scarier".
Viagra strengths
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. "Sex, Drugs and That Little Blue Pill". Archived from the original on 6 December 2017. While you may see product availability reduction in the near-term, please be assured that we at McGuff Medical are continuing to work diligently to ensure an uninterrupted supply of products and alternative products to you. Additionally, in order to ensure healthcare providers have access to the PPEs they need, the McGuff Company is temporarily limiting PPEs to healthcare providers.
| Interaction | Effect | Management Tips |
|---|---|---|
| Nitrates | Severe hypotension, danger to life | Avoid combination |
| Alpha-blockers | Risk of hypotension | Use with caution, monitor blood pressure |
| CYP3A4 inhibitors | Increased sildenafil levels, risk of side effects | Dose adjustments may be needed |
| Other PDE-5 inhibitors | Increased risk of adverse effects | Use separate medications |
As always, please feel free to reach out to our McGuff Customer Service team with any questions that you may have. If you are a consumer or patient please visit this version. 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 is sometimes used off-label for other health issues.
- Its interaction with blood thinners should be monitored.
- Men with retinitis pigmentosa should avoid sildenafil.
- Always inform healthcare providers about all treatments.
- Use sildenafil in conjunction with a healthy lifestyle.
- Avoid unnecessary medication to prevent side effects.
- Be aware of potential drug interactions with sildenafil.
- Proper storage maintains medication efficacy over time.
(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. Use with strong CYP3A inhibitors: Not recommended. 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.
- Sildenafil tablets 125 mg are generally well-tolerated.
- Seek medical attention if you experience vision changes.
- They are typically used on an as-needed basis.
- Avoid heavy meals before taking sildenafil to improve absorption.
- Sildenafil is not a cure for erectile dysfunction.
- Pregnant women should avoid sildenafil use.
- It is important to stay hydrated while using the medication.
- Follow specific instructions provided by your healthcare provider.
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.