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[60][61] The drug was patented in 1996, approved for use in erectile dysfunction by the FDA on 27 March 1998, becoming the first oral treatment approved to treat erectile dysfunction in the United States, and offered for sale in the United States later that year.
What are the side effects?
[32] Sildenafil's brand name, Viagra, is widely recognized in popular culture, and the drug's association with treating erectile dysfunction has led to its recreational use. [33] The reasons behind such use include the belief that the drug increases libido, improves sexual performance,[33] or permanently increases penis size. [34] Studies on the effects of sildenafil when used recreationally are limited, but suggest it has little effect when used by those who do not have erectile dysfunction. In one study, a 25 mg dose was shown to cause no significant change in erectile quality, but did reduce the postejaculatory refractory time. [35] This study also noted a significant placebo effect in the control group.
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Unprescribed recreational use of sildenafil and other PDE5 inhibitors is noted as particularly high among users of illegal drugs. [36] Sildenafil is sometimes used to counteract the effects of other substances, often illicit. [33] Some users mix it with methylenedioxymethamphetamine (MDMA, ecstasy), other stimulants, or opiates in an attempt to compensate for the common side effect of erectile dysfunction, a combination known as "sextasy", "rockin' and rollin'", "hammerheading", or "trail mix". [33] Mixing it with amyl nitrite, another vasodilator, is particularly dangerous and potentially fatal. The 2007 Ig Nobel Prize in aviation went to Patricia V.
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Agostino, Santiago A. Plano, and Diego A. Golombek of Universidad Nacional de Quilmes, Argentina, for their discovery that sildenafil helps treat jet lag recovery in hamsters. Professional athletes have been documented using sildenafil, believing the opening of their blood vessels will enrich their muscles. In turn, they believe it will enhance their performances. [62] It soon became a great success: annual sales of Viagra peaked in 2008 at US$1.934 billion. In the US, even though sildenafil is available only by prescription from a doctor, it was advertised directly to consumers on TV (famously being endorsed by former United States Senator Bob Dole and football star Pelé). Numerous sites on the Internet offer Viagra for sale after an "online consultation", often a simple web questionnaire. Viagra and other products for sexual dysfunction, termed sexuopharmaceuticals, proliferated new types of specialised marketing for such products.
| Medication Class | Interaction Effect | Notes |
|---|---|---|
| Nitrates | Dangerous drop in blood pressure | Avoid combining |
| Alpha-blockers | Increased risk of hypotension | Use under medical supervision |
| Antibiotics | Possible altered absorption | Consult doctor if on antibiotics |
| Other ED medications | Risk of additive side effects | Not recommended to combine |
[66] Viagra and similar prescription pharmaceuticals were promoted by images in media to the extent of becoming a cultural icon, at the time a relatively new phenomenon known to be permitted only in the United States and New Zealand and which is believed to have significantly contributed to norms regarding male sexuality.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Kamagra 100 mg | 100 mg | 180 + 6 Pills | 436.79€ 415.99€ | |
| Kamagra Gold | 50 mg | 180 + 6 Pills | 371.27€ 353.59€ | |
| Kamagra Polo | 100 mg | 60 + 4 Pills | 189.39€ 180.37€ | |
| Kamagra Effervescent Tablets | 100 mg | 28 Pills | 90.83€ 86.50€ | |
| Super Kamagra | 160 mg | 20 + 4 Pills | 155.35€ 147.95€ | |
| Kamagra Effervescent Tablets | 100 mg | 63 + 7 Pills | 171.99€ 163.80€ | |
| Kamagra Effervescent Tablets | 100 mg | 84 + 7 Pills | 202.91€ 193.25€ | |
| Kamagra 100 mg | 100 mg | 60 + 4 Pills | 201.34€ 191.75€ | |
| Kamagra Gold | 100 mg | 180 + 6 Pills | 436.79€ 415.99€ | |
| Super Kamagra | 160 mg | 8 Pills | 69.23€ 65.93€ |
[67] One author notes that although the effect of Viagra is only limited to penile blood vessels, advertisements routinely use imagery of couples hugging, smiling and dancing, with the author claiming that pharmaceutical companies were deceptive in the use of such advertisements.
Medical uses
The preparation steps for synthesis of sildenafil are:[54] Methylation of 3-propylpyrazole-5-carboxylic acid ethyl ester with hot dimethyl sulfate Hydrolysis with aqueous sodium hydroxide (NaOH) to free acid Carboxamide formation with refluxing thionyl chloride/NH4OH Reduction of nitro group to amino group Sildenafil (compound UK-92,480) was synthesized by a group of pharmaceutical chemists led by Simon Campbell[55] working at Pfizer's Sandwich, Kent, research facility in England. It was initially studied for use in hypertension (high blood pressure) and angina pectoris (a symptom of ischaemic heart disease). [56] The first clinical trials were conducted in Morriston Hospital in Swansea. [57] Phase I kamagra jelly 200mg clinical trials under the direction of Ian Osterloh suggested the drug had little effect on angina, but it could induce marked penile erections. [58][59] Pfizer therefore decided to market it for erectile dysfunction, rather than for angina; this decision became an often-cited example of drug repositioning. In 2000, Viagra sales accounted for 92% of the global market for prescribed erectile dysfunction pills. [69] By 2007, Viagra's global share had plunged to about 50%[70] due to several factors, including the entry of Cialis and Levitra, along with several counterfeits and clones, and reports of vision loss in people taking PDE5 inhibitors.
- Kamagra 120 is often used as a cost-effective alternative to brand-name ED treatments.
- The medication works by increasing blood flow to the penis during arousal.
- Kamagra 120 is manufactured by Ajanta Pharma, based in India.
- The medication should be stored in a cool, dry place away from children.
- It is not recommended to consume alcohol with Kamagra 120 due to possible interactions.
- Kamagra 120 has been linked with some reports of vision disturbances.
- Patients with heart issues should consult a doctor before taking Kamagra 120.
- The effectiveness of Kamagra 120 varies depending on individual health conditions.
- Overdose of Kamagra 120 can cause serious health problems, including low blood pressure.
- Kamagra 120 may interact with other medications, including alpha-blockers.
- Always follow dosage instructions and avoid exceeding the recommended dose.
[71][72] In 2008, the FDA forced Pfizer to remove Viva Cruiser, an advergame for Viagra, from appearing on Forbes, after the game failed to disclose risk information about the drug.
| Condition | Contraindicated with | Precautions |
|---|---|---|
| Heart problems | Nitrates medication | Do not use without doctor approval |
| Severe liver or kidney disease | Yes | Dose adjustments may be needed |
| Allergies to sildenafil or fillers | Yes | Check ingredients |
| Recent stroke or heart attack | Yes | Consult physician before use |
In February 2007, it was announced that Boots, the UK pharmacy chain, would try over-the-counter sales of Viagra in stores in Manchester, England.
- Regular use of Kamagra 120 can improve confidence in sexual performance.
- The drug is not a cure for erectile dysfunction but alleviates symptoms temporarily.
- It is crucial to avoid combining Kamagra 120 with other PDE5 inhibitors.
- Some users may experience a drop in blood pressure after taking Kamagra 120.
- Kamagra 120 is not intended for use by women or children.
- The medication's efficacy can be influenced by food intake; high-fat meals may delay effects.
- In case of an allergic reaction, such as rashes or swelling, seek medical help immediately.
- Kamagra 120 should be used as part of a broader approach to men's sexual health.
- The website from which you purchase Kamagra 120 should be reputable and verified.
- Do not use Kamagra 120 if you have a history of anatomical penile deformities.
- Always read the patient information leaflet before starting Kamagra 120 therapy.
Males between the ages of 30 and 65 would be eligible to buy four tablets after a consultation with a pharmacist.
Adverse effects
Acetildenafil and other synthetic structural analogs of sildenafil which are PDE5 inhibitors have been found as adulterants in a number of "herbal" aphrodisiac products sold over-the-counter. [41] These analogs have not undergone any of the rigorous testing that drugs like kamagra tablet 100mg sildenafil have passed, and thus have unknown side-effect profiles. [42] Some attempts have been made to ban these drugs, but progress has been slow so far, as, even in those jurisdictions that have laws targeting designer drugs, the laws are drafted to ban analogs of illegal drugs of abuse, rather than analogs of prescription medicines. However, at least one court case has resulted in a product being taken off the market. The US Food and Drug Administration (FDA) has banned numerous products claiming to be Eurycoma longifolia that, in fact, contain only analogs of sildenafil.
Does Kamagra increase blood pressure?
[44][45][46] Sellers of such fake herbals typically respond by just changing the names of their products. Sildenafil and/or N-desmethylsildenafil, its major active metabolite, may be quantified in plasma, serum, or whole blood to assess pharmacokinetic status in those receiving the drug therapeutically, to confirm the diagnosis in potential poisoning victims, or to assist in the forensic investigation in a case of fatal overdose. Nitric oxide (NO) in the corpus cavernosum of the penis binds to guanylate cyclase receptors, which results in increased levels of cGMP, leading to smooth muscle relaxation (vasodilation) of the intimal cushions of the helicine arteries. This smooth muscle relaxation leads to vasodilation and increased inflow of blood into the spongy tissue of the penis, causing an erection. [49] Robert F.
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Furchgott, Ferid Murad, and Louis Ignarro won the Nobel Prize in Physiology or Medicine in 1998 for their independent study of the metabolic pathway of nitric oxide in smooth muscle vasodilation. The molecular mechanism of smooth muscle relaxation involves the enzyme CGMP-dependent protein kinase, also known as PKG. This kinase is activated by cGMP and it phosphorylates multiple targets in the smooth muscle cells, namely myosin light chain phosphatase, RhoA, IP3 receptor, phospholipase C, and others. [50] Overall, this results in a decrease in intracellular calcium and desensitizing proteins to the effects of calcium, engendering smooth muscle relaxation. The molecular structure of sildenafil is similar to that of cGMP and acts as a competitive binding agent of PDE5 in the corpus cavernosum, resulting in more cGMP and increased penile response to sexual stimulation. [75] In 2017, the Medicines and Healthcare products Regulatory Agency (MHRA) enacted legislation that expanded this nationwide,[76] allowing a particular branded formulation of Sildenafil, Viagra Connect (50 mg), to be sold over the counter and without a prescription throughout the UK from early 2018.
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[49][51] Without sexual stimulation, and therefore lack of activation of the NO/cGMP system, sildenafil should not cause an erection. Other drugs that operate by the same mechanism include tadalafil (Cialis) and vardenafil (Levitra). Sildenafil is broken down in the liver by hepatic metabolism using cytochrome p450 enzymes, mainly CYP450 3A4 (major route), but also by CYP2C9 (minor route) hepatic isoenzymes. The major product of metabolisation by these enzymes is N-desmethylated sildenafil, which is metabolised further. This metabolite also has an affinity for the PDE receptors, about 40% of that of sildenafil.
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Thus, the metabolite is responsible for about 20% of sildenafil's action. Sildenafil is excreted as metabolites predominantly in the feces (about 80% of administered oral dose) and to a lesser extent in the urine (around 13% of the administered oral dose). If taken with a high-fat meal, absorption is reduced; the time taken to reach the maximum plasma concentration increases by around one hour, and the maximum concentration itself is decreased by nearly one-third. When taken orally, sildenafil for erectile dysfunction results in an average time to onset of erections of kamagra 100mg oral jelly strawberry 27 minutes (ranging from 12 to 70 minutes). Sublingual use of sildenafil for erectile dysfunction results in an average onset of action of 15 minutes and lasting for an average of 40 minutes. While the sale remains subject to a consultation with a pharmacist, the other restrictions from the trial have been removed, allowing customers over the age of 18 to purchase an unlimited number of pills.
- Kamagra 120 may be used by men with various degrees of erectile dysfunction.
- The medication is often taken orally with water for easier absorption.
- It’s essential to inform your doctor about all medications before using Kamagra 120.
- Some users report rapid onset of action, within about 20-30 minutes.
- Kamagra 120 is sometimes used recreationally but carries health risks.
- Side effects can be mild or severe, with serious ones requiring immediate medical attention.
- The safety profile of Kamagra 120 is not fully established in over-65 populations.
- Storage should keep Kamagra 120 away from heat and humidity to preserve potency.
- Fake Kamagra 120 products are common online; verify authenticity before purchase.
- Individuals with liver or kidney problems should use Kamagra 120 with medical guidance.
- Kamagra 120 does not protect against sexually transmitted infections; use protection.
In May 2013, Pfizer, which manufactures Viagra, told the Associated Press they will begin selling the drug directly to people on its website. Pfizer's patents on Viagra expired outside the US in 2012; in the US they were set to expire, but Pfizer settled litigation with each of Mylan and Teva which agreed that both companies could introduce generics in the US in December 2017.
- Kamagra 120 is a pharmaceutical product used to treat erectile dysfunction in men.
- The active ingredient in Kamagra 120 is sildenafil citrate, similar to Viagra.
- Kamagra 120 is available without a prescription in some countries, but caution is advised.
- The recommended dose of Kamagra 120 is 100mg, but some manufacturers sell a 120mg version.
- Kamagra 120 should be taken about 30-60 minutes before sexual activity.
- The effects of Kamagra 120 last approximately 4-6 hours.
- Common side effects of Kamagra 120 include headaches, flushing, and nasal congestion.
- Kamagra 120 is not suitable for individuals taking nitrates or other specific medications.
- Using Kamagra 120 excessively can increase the risk of adverse effects.
- It’s important to purchase Kamagra 120 from reputable sources to avoid counterfeit products.
- Consulting a healthcare provider before using Kamagra 120 is recommended for safety.
[79][80] In December 2017, Pfizer released its own generic version of Viagra. As of 2018[update], the US Food and Drug Administration has approved fifteen drug manufacturers to market generic sildenafil in the United States.