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". "Drug repositioning: identifying and developing new uses for existing drugs".
5.1 Cardiovascular
^ 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". ^ a b Webb DJ, Freestone 25 mg viagra S, Allen MJ, Muirhead GJ (March 1999).
Cons of Viagra
"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. "Onset and duration of action of sildenafil for the treatment of erectile dysfunction". 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. ^ Gurevich M, Cormier N, Leedham U, Brown-Bowers A (August 2018). Sexuopharmaceutical use by men as prevention and proficiency".
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Viagra Generic | 50mg | 30 + 4 Pills | 54.26€ 51.68€ | |
| Viagra Soft Tabs | 100mg | 20 Pills | 62.99€ 59.99€ | |
| Viagra Generic | 100mg | 360 + 10 Pills | 330.21€ 314.49€ | |
| Viagra Generic | 25mg | 10 Pills | 25.19€ 23.99€ | |
| Viagra Generic | 25mg | 180 + 6 Pills | 154.93€ 147.55€ | |
| Viagra Generic | 25mg | 60 + 4 Pills | 71.99€ 68.56€ | |
| Viagra Super Active | 100mg | 60 + 8 Pills | 116.84€ 111.28€ | |
| Viagra Super Active | 100mg | 90 + 10 Pills | 165.61€ 157.72€ | |
| Viagra Super Active | 100mg | 120 + 16 Pills | 198.37€ 188.92€ | |
| Viagra Generic | 100mg | 120 + 6 Pills | 149.50€ 142.38€ | |
| Viagra Generic | 100mg | 60 + 4 Pills | 96.36€ 91.77€ |
"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? 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'". Archived from the original on 19 December 2019.
Chemical synthesis
Archived from the original on 26 January 2013. "Sildenafil accelerates reentrainment of circadian rhythms after advancing light schedules". Proceedings of the National Academy of Sciences of the United States of America. "Source: Roger Clemens, host of athletes pop Viagra to help onfield performance". Archived from the original on 14 August 2020.
Patient resources
"Bears' Brandon Marshall says some NFL players use Viagra .. on the Field". Archived from the original on 5 March 2016. "Towards a decade of detecting new analogues of sildenafil, tadalafil and vardenafil in food supplements: a history, analytical aspects and health risks". "Detection of sildenafil analogues in herbal products for erectile dysfunction".
Viagra 100mg Tablet
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". Archived from the original on 23 April 2019. Archived from the original on 6 May 2018.
2.4 Dosage Adjustments Due to Drug Interactions
^ "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. Our clinicians regularly offer patients the opportunity to take part in trials of new drugs and treatments. 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. 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. "Sex, Drugs and viagra cream 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". Archived from the original on 17 April 2021. ^ "Set to conquer US, Indian 'Viagras' may give Pfizer a hard Time".
| User Type | Recommended Dose | Comments |
|---|---|---|
| Healthy Men | 50-100 mg | Based on tolerance |
| Sensitive Users | 25 mg | Start low to assess response |
| Older Adults | 25-50 mg | Lower doses preferred |
| Patients with Heart Conditions | Under medical supervision | No self-medication |
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". Archived from the original on 10 January 2017.
| Brand | Manufacturer | Price Range (per pill) | Availability | Notes |
|---|---|---|---|---|
| Pfizer Viagra | Pfizer Inc. | $15 - $30 | Widely available | Original brand |
| YellowPower | Generic Labs | $5 - $10 | Online pharmacies | Generic version |
| MaxiYellow | HealthCorp | $8 - $18 | Pharmacies | Alternative brand |
"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. ^ "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". 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 dapoxetine viagra 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".
- There are various brands producing yellow Viagra pills, with slight ingredient variations.
- The pill can sometimes be identified by its specific shape and markings.
- Regular monitoring by a healthcare provider is recommended during treatment.
- Viagra's molecular structure is designed to target specific enzymes related to erections.
- Consumers should beware of unverified sources selling cheap or suspicious yellow pills.
- Proper use and adherence to prescribed doses maximize safety and effectiveness.
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. "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".
The bottom line
"Drug interactions with phosphodiesterase-5 inhibitors used for the treatment of erectile dysfunction or pulmonary hypertension". "Pharmacology and drug interaction effects of the phosphodiesterase 5 inhibitors: focus on alpha-blocker interactions". Use of sildenafil (Viagra) in patients with cardiovascular disease. American College of Cardiology/American Heart Association". Journal of the American College of Cardiology.
Raynaud's phenomenon
^ "Viagra (Sildenafil Citrate): Side Effects, Interactions, Warning, Dosage & Uses". Archived from the original on 12 July 2018. "Young men add Viagra to their drug arsenal". Archived from the original on 4 September 2014. "Recreational use and misuse of phosphodiesterase 5 inhibitors".
Are you currently using Tadalafil (Cialis, Adcirca, and others)?
Archived from the original on 21 August 2016. "Sildenafil does not improve sexual function in men without erectile dysfunction but does reduce the postorgasmic refractory time". ^ McCambridge J, Mitcheson L, Hunt N, Winstock A (March 2006). "The rise of Viagra among British illicit drug users: 5-year survey data". "Does marijuana use play a role in the recreational use of sildenafil?". 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 the original on 25 June 2007.
| Side Effect | Severity | Common Symptoms | Frequency | Recommended Action |
|---|---|---|---|---|
| Headache | Mild | Throbbing head | Common | Hydrate, rest |
| Flushing | Mild | Warm sensation | Common | Cooling measures |
| Dizziness | Moderate | Lightheadedness | Less common | Sit or lie down |
| Vision Changes | Mild | Blur or blue tint | Less common | Seek medical help if persistent |
"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". Enter the imprint code that appears on the pill. Alternatively, search by drug name or NDC code using the fields above. Tip: Search for the imprint first, then refine by color and/or shape if you have too many results. Ignore the logo and type in any other letters or numbers into the imprint search. To refine your results further, add the word "logo" in place of the logo.
- Yellow Viagra pills are often found online, but beware of counterfeit products.
- Authentic pills are manufactured under strict quality control standards.
- The medication is not an aphrodisiac; it requires sexual stimulation to work.
- Do not combine Viagra with alcohol, as it can worsen side effects.
- People with certain health conditions should avoid using Viagra without consulting a doctor.
- Yellow Viagra pills can be part of treatment for erectile dysfunction caused by health issues.
View our logo identification page for common manufacturer imprints and logos. All prescription and over-the-counter (OTC) drugs in the U.S. are required by the FDA to have an imprint code. If your pill has no imprint it could be a vitamin, diet, herbal, or energy pill, or an illicit or foreign drug. It is not possible to accurately identify a pill online without an imprint code. Cialis (tadalafil) is a prescription medication used to treat erectile dysfunction and symptoms of benign prostatic hyperplasia. Common Cialis side effects include headache, upset stomach, and back pain. Low blood pressure can also happen, especially if you combine Cialis with other substances that lower your blood pressure. Rare, but serious Cialis side effects include vision problems, sudden hearing loss, and erections that last longer than 4 hours (priapism).
- Viagra Interactions with Other Medications
- The most potent over-the-counter potency remedy and erectile dysfunction tablets (2026 ranking)
- Effective treatments for better sex
- Branded Cialis®
- DRUG INTERACTIONS
- Uso corretto — Quanto costa il viagra in farmacia 2018
- Αγορά Cialis πό online φαρμακείο χωρίς συνταγή στην Ελλάδα