"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.
- Sildenafil 20 mg tablets are manufactured by several pharmaceutical companies.
- Generic versions are usually less expensive than brand-name options.
- The drug works by inhibiting phosphodiesterase type 5 enzyme.
- Patients should report any unusual symptoms promptly.
- It is important to have a proper diagnosis before starting treatment.
^ "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". Archived from the original on 19 November 2016. "Counterfeit Viagra, Cialis, Levitra: The Ultimate Guide".
- Sildenafil 20 mg tablets are used primarily to treat erectile dysfunction.
- They work by increasing blood flow to the penis.
- Typically, the medication is taken 30-60 minutes before activity.
- The effects of sildenafil can last up to 4-6 hours.
- Do not take more than one tablet per day.
Archived from the original on 10 January 2017. "Online pharmacies suspected of counterfeit drug sales".
Which Makes You Harder?
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". Archived from the original on 9 September 2017. ^ "Viagra to go generic in 2017 according to Pfizer agreement".
Before taking sildenafil,
Archived from the original on 1 December 2017. "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. ^ "Erectile Dysfunction sildenafil citrate tablets 200mg 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.
| Parameter | Description |
|---|---|
| Absorption | Rapid, within 30-60 minutes |
| Bioavailability | Approximately 40% |
| Metabolism | Mainly hepatic via CYP3A4 enzyme |
| Excretion | Mainly in feces, some in urine |
| Half-life | About 4 hours |
^ "Israeli-made AI exposes international fake Viagra network".
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Viagra Generic | 100mg | 30 + 4 Pills | 60.91€ 58.01€ | |
| Viagra Generic | 150mg | 180 + 10 Pills | 236.46€ 225.20€ | |
| Kamagra | 100mg | 20 Pills | 86.09€ 81.99€ | |
| Viagra Generic | 25mg | 20 Pills | 37.74€ 35.94€ | |
| Viagra Generic | 25mg | 120 + 6 Pills | 125.56€ 119.58€ | |
| Viagra Generic | 200mg | 30 + 2 Pills | 83.07€ 79.11€ | |
| Kamagra | 100mg | 60 + 4 Pills | 201.34€ 191.75€ | |
| Viagra Generic | 25mg | 180 + 6 Pills | 154.93€ 147.55€ | |
| Viagra Generic | 100mg | 360 + 10 Pills | 330.21€ 314.49€ | |
| Viagra Generic | 100mg | 10 Pills | 28.91€ 27.53€ | |
| Viagra Generic | 100mg | 90 + 6 Pills | 129.02€ 122.88€ | |
| Viagra Generic | 50mg | 10 Pills | 26.87€ 25.59€ |
^ "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".
- Sildenafil 20 mg can interact with nitrates used for chest pain.
- Store tablets at room temperature, away from moisture.
- Do not crush or split the tablets; swallow whole.
- It is not recommended for use by women or children.
- Known for its rapid onset, usually within 30 minutes.
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.
Usual Geriatric Dose for Erectile Dysfunction
^ 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? Viagra and Male Sexuality in Popular Culture". "A new view of women's sexual problems: Why new?
Warnings for other groups
Archived from the original on 3 January 2009. Archived from the original on 12 October 2008. "Sales of Impotence Drugs Fall, Defying Expectations". Archived from the original on 11 October 2007. ^ "Pfizer Courting More Controversy with Viagra 'Advergaming'".
What should I know about sildenafil before taking it?
Archived from the original on 19 December 2019. 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". ^ "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. "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?".
Other uses for this medicine
"Detection of sildenafil analogues in herbal products for erectile dysfunction". Archived from the original on 4 March 2016. ^ "FDA Warns Consumers About Dangerous Ingredients in "Dietary Supplements" Promoted for Sexual Enhancement". Archived from the original on 18 January 2017. ^ "Hidden Risks of Erectile Dysfunction 'Treatments' Sold Online".
Does sildenafil interact with foods or drinks?
Archived from the original on 23 April 2019. ^ R. Baselt, Disposition of Toxic Drugs and Chemicals in Man, 9th edition, Biomedical Publications, Seal Beach, CA, 2011, pp. Archived from the original (PDF) on 10 September 2011. "Structure of the catalytic domain of human phosphodiesterase 5 with bound drug molecules".
How does sildenafil work (mechanism of action)?
^ a b Webb DJ, Freestone S, Allen MJ, Muirhead GJ (March 1999). "Sildenafil citrate and blood-pressure-lowering drugs: results of drug interaction studies with an organic nitrate and a calcium antagonist". ^ Goldstein I, Lue TF, Padma-Nathan H, Rosen RC, Steers WD, Wicker PA (May 1998). "Oral sildenafil in the treatment of erectile dysfunction. Archived from the original on 14 January 2012. 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 the original on 25 June 2007.
| Medication Type | Interaction Effect | Risk Level | Recommendation |
|---|---|---|---|
| Nitrates | Severe hypotension | High | Do not combine |
| Alpha-blockers | Increased risk of blood pressure drop | Moderate | Use under medical supervision |
| CYP3A4 inhibitors | Increased sildenafil levels | Moderate | Adjust dose or avoid |
| Ritonavir | Elevated risk of side effects | High | Consult healthcare provider |
"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. ^ "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". Erectile dysfunction (ED) is a common condition that affects millions of men worldwide. It is characterized by the inability to achieve or maintain an erection sufficient for sexual intercourse. While several treatment options are available, including lifestyle changes and prescription medication, sildenafil 20 mg tablet has emerged as a game-changer in the treatment of ED. Sildenafil 20 mg tablet, also known as Viagra, is an oral medication approved by the FDA for the treatment of ED. It works by increasing blood flow to the penis, thereby facilitating an erection. The medication is typically taken 30 minutes to an hour before sexual activity and should not be taken more than once a day. Sildenafil 20 mg tablet has several benefits that make it an attractive treatment option for ED, including: Clinical trials have shown that sildenafil 20 mg tablet is highly effective in treating ED. In fact, a study published in the Journal of Sexual Medicine found that sildenafil was effective in treating ED in 82% of men. Sildenafil 20 mg tablet typically takes effect within 30 minutes to an hour after ingestion, making it a fast-acting treatment option for ED. Sildenafil 20 mg tablet is an oral medication that can be taken with or without food. This makes it a convenient treatment option for ED that can easily be incorporated into a patient's daily routine. While all medications come with some risk of side effects, sildenafil 20 mg tablet has been shown to have a relatively low risk of adverse effects when taken as directed. Side effects may include headache, facial flushing, and upset stomach, but these are typically mild and short-lived. Patient feedback on sildenafil 20 mg tablet has been overwhelmingly positive.
8.4 Pediatric Use
"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. "Sildenafil: from angina to erectile dysfunction to pulmonary hypertension and beyond". Archived from the original on 26 September 2008.
What are the most common side effects of sildenafil?
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. "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".
Serious side effects
"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. "Health situation in former communist bloc is dire, says Unicef". Archived from the original on 1 November 2012. Many men have reported significant improvements in their ability to achieve and maintain an erection, as well as increased sexual satisfaction and confidence. One patient wrote, "Sildenafil has changed my life. I can finally enjoy a healthy sex life again with my partner." Another said, "I was skeptical about taking medication for my ED, but sildenafil has been a game-changer for me. I feel more confident and satisfied in my sexual relationships." Sildenafil 20 mg tablet is a highly effective and safe treatment option for ED that has helped millions of men worldwide regain their sexual confidence and satisfaction. While all medications come with some risk of side effects, sildenafil's benefits far outweigh any potential risks, making it a top choice for patients and healthcare providers alike. If you are struggling with ED, talk to your doctor about whether sildenafil 20 mg tablet may be right for you. Sildenafil oral tablet is available as a brand-name drug and as a generic drug. Sildenafil comes in three forms: an oral tablet, an oral suspension (liquid), and an injection that’s only given by a doctor.