Major Indian Manufacturers of Sildenafil Citrate

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Sildenafil, sold under the brand name Viagra among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. [4][8] It is also sometimes used off-label for the treatment of certain symptoms in secondary Raynaud's phenomenon. [9] It is unclear if it is effective for treating sexual dysfunction in females. [8] It can be taken orally (swallowed by mouth), intravenously (injection into a vein), or through the sublingual route (dissolved under the tongue).

Weefsel Pharma - A Worldwide Leading Generic Viagra® Manufacturer and Exporter in India

Viagra® is a branded pharmaceutical drug that is used for vasodilation in the human body. NYHA Functional Class II-III Pulmonary arterial hypertension Sildenafil has no direct relaxant effect on isolated human corpus cavernosum but potently enhances the relaxant effect of NO on it. When the NO/cGMP pathway is activated, as occurs with sexual stimulation, inhibition of PDE5 by sildenafil results in increased corpus cavernosum levels of cGMP. Therefore sexual stimulation is required in order for sildenafil to produce its intended beneficial pharmacological effects. Viagra® or Sildenafil might take about 30 minutes from the time of its ingestion, to show its effects.

Does sildenafil interact with other medicines (drug interactions)?

The terminal phase half-life observed for sildenafil is approximately 3 to 5 hours. Note: Viagra® female viagra uk is also available in various other dosage forms, like oral suspensions, sprays, and injectables as well. This medication can be stored in an airtight container and at a room temperature range of 20°C to 30°C (68°F and 86°F). However, it should be kept away from excess heat and moisture as well. Burning, numbness, and tingling in the arms and feet Choose an option Alt text (alternative text) helps when people can’t see the image or when it doesn’t load. [8][10] Onset when taken orally is typically within twenty minutes and lasts for about two hours. Common side effects include headaches, heartburn, and flushed skin.

[8] Caution is advised in those with cardiovascular disease. [8] Rare but serious side effects include vision problems, hearing loss, and prolonged erection (priapism) that can lead to damage to the penis. [8] Sildenafil should not be taken by people on nitric oxide donors such as nitroglycerin, as this may result in a serious drop in blood pressure. Sildenafil acts by blocking phosphodiesterase 5 (PDE5), an enzyme that promotes breakdown of cGMP, which regulates blood flow in the penis. [8] It requires sexual arousal to work, and does not by itself cause or increase sexual arousal. [8] It also results in dilation of the blood vessels in the lungs.

How do I store Sildenafil tablets?

These approvals are listed in the FDA’s Drugs@FDA database and reflect rigorous manufacturing and bioequivalence standards. Based on label disclosures and manufacturer filings, nearly two-thirds of active manufacturers with ANDAs on file list Indian pharmaceutical facilities as the manufacturing origin for their sildenafil citrate tablets: Based on publicly available data from the FDA’s Drugs@FDA: FDA-Approved Drugs database, the National Institute of Health, National Library of Medicine, and manufacturer disclosures. While generics are predominantly made in India, brand Viagra distributed by Pfizer in the United States is made in France and Ireland. Also in stark contrast: the price of brand vs. generic Viagra.

What is sildenafil used for?

According to PharmacyChecker price comparisons, brand Viagra runs patients around $83 per tablet at U.S. pharmacies – and that’s in conjunction with a discount coupon. Generic sildenafil is as little as $0.47 at the same U.S. pharmacies! That’s a 99% savings thanks to generic availability and the healthy competition it yields. Pfizer originally discovered the medication in 1989 while looking for a treatment for angina. [11] It was approved for medical use in the United States and in the European Union in 1998.

• Sildenafil was originally developed by Pfizer and later produced generically in India.
• Indian companies hold a significant share of the global sildenafil market.
• Male age group most commonly using Viagra in India ranges from 40 to 60 years.
• Viagra’s effects typically last 4 to 6 hours, depending on individual health.
• The Indian pharmaceutical industry exports sildenafil-based medicines to over 150 countries.
• Some Indian brands produce extra-fast-acting Viagra formulations.
• The World Health Organization recognizes Indian sildenafil drugs as safe when approved.
• Education about proper Viagra use is increasing through Indian health campaigns.
• Pharmacovigilance systems monitor adverse effects of Viagra in the Indian population.
• Research continues into improving bioavailability and reducing side effects of Viagra.

[5][8][11][12] In 2023, it was the 151st most commonly prescribed medication in the United States, with more than 3 million prescriptions.

[13][14] It is available as a generic medication.

• Erectile dysfunction affects a significant percentage of men in India.
• Viagra’s popularity in India has grown due to social and demographic factors.
• Indian doctors often prescribe Viagra for age-related sexual health issues.
• The stigma around ED in India is reducing with greater awareness and available treatment.
• FDA-approved generics in India must adhere to strict manufacturing and testing standards.
• The Indian market provides a variety of dosages to suit individual needs.
• Some Indian pharmacies offer home delivery of Viagra with prescription validation.
• The cost-effectiveness of Indian Viagra makes it a preferred choice worldwide.
• Women in India are increasingly advocating for sexual health products including ED medications.
• Continued research in India aims to develop new formulations for erectile dysfunction.

[15][16] In the United Kingdom, it is available as a pharmacy medicine. The primary indication of sildenafil is treatment of erectile dysfunction (inability to sustain a satisfactory erection to complete sexual intercourse). Its use is now one of the standard treatments for erectile dysfunction, including for males with diabetes mellitus.

Brand Viagra Marketed in the USA is Made in Europe

Don’t live in the United States? International online pharmacies also ship generic Viagra (sildenafil) for as low as $0.47 per pill through Indian dispensing partners. The brand Viagra, sourced from a UK dispensing pharmacy, ships worldwide for as low as $7 per pill. There are affordable and safe pathways to obtain Viagra, whether you’re purchasing brand or generic, in the U.S. or internationally.

How does sildenafil work (mechanism of action)?

At PharmacyChecker, we support your right to safe, affordable, and transparent medication access. Through our International Pharmacy Verification Program and ongoing drug sourcing research, PharmacyChecker continues to provide patients worldwide with information about the dispensing source of their medicine, where it is manufactured, and whether it meets the highest international safety standards. One name that instantly hits most of us when it comes to ED medicines, is Viagra® (Sildenafil Citrate). Hence, as a worldwide leading pharmaceutical manufacturing and exporting company, Weefsel Pharma deals in Viagra® tablets along with other pharmaceutical medications and allied products. Let us delve deeper into the most important aspects of Viagra® (Sildenafil) herein. Tentative evidence suggests that sildenafil may help males who experience antidepressant-induced erectile dysfunction. While sildenafil improves some markers of disease in people with pulmonary arterial hypertension, it does not appear to affect the risk of death or serious side effects. Sildenafil and other PDE5 inhibitors are used off-label to alleviate vasospasm and treat severe ischemia and ulcers in fingers and toes for people with secondary Raynaud's phenomenon;[9][21] these drugs have moderate efficacy for reducing the frequency and duration of vasospastic episodes.

What is Sildenafil Citrate?

are regulated for safety and efficacy by pharmaceutical/pharmacy regulatory authorities in their respective countries. The icon means this online pharmacy ships prescriptions only from dispensing pharmacies located in Canada. Separately, the Tier 1 icon indicates that an online pharmacy fills prescriptions only through its own pharmacy or through dispensing partners located in countries with advanced regulatory oversight. PharmacyChecker currently lists Tier 1 online pharmacies that work with dispensing partners in Australia, Canada, New Zealand, the United Kingdom, and the United States. All PharmacyChecker-accredited online pharmacies, regardless of tier, meet the same high standards defined in the PharmacyChecker International Pharmacy Verification Program.

Recreational use

Learn more about Tier 1 international pharmacies. The Tier 1 icon indicates that an online pharmacy fills prescriptions only through its own pharmacy or through dispensing partners located in countries with advanced regulatory oversight. The icon means that this online pharmacy accredited by PharmacyChecker fills prescription orders through either their own pharmacy or dispensing pharmacy partners located in Australia, India, Mauritius, New Zealand, Turkey, the UK, or Canada. Please note that all PharmacyChecker-accredited online pharmacies (tier 1 and non-tier 1) meet the same high standards as identified in the PharmacyChecker Verification Program. For information about Tier 1 international pharmacies click here. [9] As of 2016,[update] their role more generally in Raynaud's was not clear. Sildenafil has shown some potential for improving exercise performance at high altitudes. However, its overall efficacy is not clear.

• The global sildenafil market is projected to grow due to increasing ED awareness.
• Indian pharmaceutical exports of sildenafil meds are valued in billions of dollars.
• Both men and women are researching Indian Viagra options online.
• Indian-made Viagra is often preferred due to its effectiveness and savings.
• The use of Viagra in India is often paired with health screening for safe use.
• Cybersecurity measures are important when purchasing Viagra through online sources.
• The Indian government monitors the quality of sildenafil products through random testing.
• Patients are advised to report any adverse reactions to healthcare providers promptly.
• Some Indian medical insurance plans now cover certain ED medications including Viagra.
• Continued technological advances are likely to improve Indian Viagra manufacturing quality.

Sildenafil has been studied for high-altitude pulmonary edema (HAPE), but its use is currently not recommended for that indication. In clinical trials, the most common adverse effects of sildenafil use included headache, flushing, indigestion, nasal congestion, and impaired vision, including photophobia and blurred vision.

Side Effects

PharmacyChecker provides free monthly email updates of the latest prices. If you’re prescribed generic sildenafil citrate (U.S. brand name: Viagra), chances are your medication was made in India. In fact, 65% of companies with active FDA-approved ANDAs for generic Viagra manufacture sildenafil in Indian pharmaceutical facilities, according to a recent review of regulatory filings conducted by PharmacyChecker. While the FDA has faced documented challenges in overseeing foreign manufacturing plants, facilities abroad that supply the U.S.

What should I know about sildenafil before taking it?

market are subject to FDA inspections and must meet the same current Good Manufacturing Practices (cGMP) standards as U.S.-based facilities. India’s global dominance in generic drug manufacturing — built on scale, cost efficiency, and regulatory competence — has helped make sildenafil citrate one of the most affordable prescription medications available today. When sourced safely and through reputable providers, that’s good news for patients seeking a cost-effective treatment for erectile dysfunction. As of June 2025, there are 28 approved Abbreviated New Drug Applications (ANDAs) for sildenafil citrate in oral tablet form, with 3 more tentatively approved for U.S. prescription sales. [4] Some sildenafil users have complained of seeing everything tinted blue (cyanopsia). [24] This cyanopsia can be explained because sildenafil, while selective for PDE5, does have some affinity for PDE6, which is the phosphodiesterase found in the retina.