Both Viagra® and generic for Viagra® were approved by the Food and Drug Administration (FDA) to treat ED and millions of men have used Viagra® or the generic for Viagra® to treat their erectile dysfunction. Generic medications do not compromise the safety of a medication.

• Use price comparison websites to evaluate sildenafil costs.
• Avoid ordering from unverified or unlicensed sellers.
• Read patient testimonials for real user experiences.
• Ensure the website clearly states its prescription policy.
• Confirm the pharmacy displays certification logos.
• Make an informed choice based on transparency and reviews.

The cost is lower than brand name medication for many reasons, most notably because the brand name medication is no longer legally protected against competition from other manufacturers.

Did you know that the drug Viagra was discovered by accident?

This medication for erectile dysfunction is serious; it affects blood flow and other bodily functions. Speak to a doctor before buying and using Viagra if you: have blood disorders such as sickle cell anaemia, leukaemia, or multiple myeloma; have Peyronie’s disease or anatomical penile deformities; Should you experience sudden vision changes, stop using Viagra and seek immediate medical advice. Clinicians developed a clear administration protocol to ensure success for erectile dysfunction treatment with Viagra: Take one tablet with water 30–60 minutes before sexual activity. The effect of Viagra lasts for around 4 to 6 hours. Heavy, high-fat meals may delay the effect of Viagra.

Restricted Blood Flow Blocks Erections

Taking sildenafil on an empty stomach enhances its effect. Viagra and alcohol do not mix well — alcohol can reduce erection quality and increase side-effect risk. If you take Viagra to help with erectile dysfunction, drink alcohol in moderation, or avoid it altogether. Take no more than one dose of Viagra in 24 hours. Viagra only works by improving blood flow with sexual stimulation and does not increase libido. Generic for Viagra® may not be safe for men with some pre-existing conditions or who are taking medications that may interact with the drug. If you have (or have ever had) heart problems (such as a heart attack), heart disease, irregular heartbeat, angina, chest pain, narrowing of the aortic valve, heart failure, heart surgery, pulmonary hypertension including pulmonary arterial hypertension, stroke, low blood pressure, high blood pressure, a deformed penis shape (Peyronie’s Disease), priapism (an erection that lasts for more than 4 hours), sickle cell anemia, multiple myeloma, leukemia, retinitis pigmentosa (a rare genetic eye disease), severe vision loss (such as NAION), bleeding problems, stomach ulcers, liver problems or kidney problems (such as kidney dialysis), you may be at higher risk for adverse effects. If you have any of these health conditions, or any other health condition, sildenafil citrate tablets 50 mg tell your healthcare provider. Your provider should be aware of all medical conditions, prescription drugs and over-the-counter meds that you are taking. Multiple companies make generic for Viagra®, including Teva Pharmaceuticals and Greenstone, a subsidiary of Pfizer Inc. Take sildenafil (generic for Viagra®) about one hour before sexual activity, as it takes about 30 minutes to an hour to begin working. Check out our guide on how to take Viagra® for best results.

• Prefer online pharmacies that work with certified couriers.
• Be wary of sites with poorly written or unprofessional content.
• Look for detailed FAQ sections related to sildenafil.
• Confirm if the pharmacy offers safe, discreet packaging.
• Check whether the site provides after-sales support.
• Always verify the pharmacy’s licensing status with UK authorities.

If you are currently taking any over-the-counter, recreational or prescription drugs or supplements, tell your healthcare provider. Some medications, like nitroglycerin (nitrates), isosorbide dinitrate, riociguat, ritonavir, itraconazole, ketoconazole, alpha blockers and “poppers”, have well-documented drug interactions with sildenafil and could cause serious side effects. If you are currently taking a PDE5 inhibitor, like Revatio for pulmonary arterial hypertension, talk to your doctor about adjusting your dosage. There are also some rare, serious side effects of sildenafil, namely an allergic reaction, loss of vision/hearing, or priapism, an erection lasting for more than four hours. Seek emergency medical attention if you experience any of these serious side effects. Learn more about the common warnings and precautions to consider before taking generic Viagra®. You can get the generic for Viagra® through an online or local pharmacy with a prescription from a licensed medical provider. Generic for Viagra® is not available over-the-counter. To get genuine generic for Viagra®, ensure that you are seeing a healthcare provider licensed in your state and have your prescription filled by a qualified pharmacy, one that is licensed in your state and has 3rd-party accreditations like LegitScript. Stock up on your Hayfever Essentials today. Expertly formulated products made with carefully chosen ingredients Save 15% on Teeth Whitening with Spotlight Oral Care Target pain where it hurts with Biofreeze.

The online doctor service can provide prescriptions for a range of common conditions, including weight loss and erectile dysfunction. Service provided by SmartScripts, registered in Ireland.

All content on this page has been medically reviewed by: Hassan Thwaini, Clinical Pharmacist and Copywriter, Master of Pharmacy (MPharm) on 30 March, 2026.

Can erectile dysfunction be a sign of another health condition?

Nitrates – must never be combined with Viagra Alpha-blockers for prostate problems or high blood pressure Always tell your doctor about all prescribed medicines, over-the-counter products and supplements before taking Viagra. Read the patient information leaflet carefully before starting this ED treatment. With a valid prescription, you can purchase Viagra safely at any UK pharmacy, with professional advice from the pharmacist. Trusted online providers offer online consultation with licensed doctors. You complete a medical questionnaire, a doctor reviews it, and if suitable, you receive a prescription and Viagra delivery direct to your home.

Erectile Dysfunction Products

Ordering online also lets you compare Viagra price options and look for offers. Never try to get Viagra without a prescription from unregulated websites. Counterfeit Viagra pills often contain untested or harmful ingredients. NHS prescriptions for Viagra for men are only available under specific medical conditions (e.g., diabetes-related ED, spinal cord injury). Most men will need a private prescription and pay for the blue pill themselves. Sildenafil is an effective treatment for erectile dysfunction. It contains the same active ingredient as branded alternatives. Sildenafil works by encouraging more blood to flow to the penis, ensuring a strong erection when you need one. It’s effective for 82% of men.1 Find the clinically proven ED treatment that suits you best. No names, no logos, no delivery fee. 4.6* from over 33,000 people like you. BSc (Hons) MBBS MRCGP AFHEA MA (Hons) AFMCP “Efficacy and Safety of Sildenafil Citrate for Treatment of Erectile Dysfunction in a Population With Associated Organic Risk Factors.” Journal of Andrology (2013). “Efficacy and Safety of Sildenafil Citrate for Treatment of Erectile Dysfunction in a Population With Associated Organic Risk Factors.” Journal of Andrology (2013). Answer a few simple questions to get the treatment you need. “Great service, helps me stay healthy and sexually active. Sildenafil is the active ingredient in Viagra, just without the brand name. The more cost effective way for easier erections. Clinically proven and used by millions worldwide. You still need to be sexually aroused for it to work, so everything needs to be exciting. Take a pill an hour before you want to have sex. Sildenafil starts to work within 30-60 mins and maximum erection potential happens around the 1 hour mark.

Who shouldn’t use Sildenafil tablets?

If Viagra does not seem to work, the reason may be: incorrect timing, unsuitable dosage, lack of arousal, interactions with other medicines or an underlying medical cause. Talk to your doctor about the best way to use Viagra. As with other erectile dysfunction medications, it is essential to strictly observe the clear contraindications. Do not take Viagra tablets if you: are taking nitrates or nitric-oxide donors; have severe heart disease or have recently had a heart attack or stroke; if your blood pressure is very low (below 90/50 mm Hg); Sildenafil is generally well-tolerated when used to treat erectile dysfunction under medical supervision. Most potential side effects are either mild or short-lived.

Your questions answered

Nevertheless, the following adverse effects should be taken into account: A full list of Viagra side effects is available in the patient information leaflet. Seek urgent medical help if you experience severe or worrying side effects. Always take Viagra at the prescribed dosage. Taking more than the prescribed dose increases the risk of serious complications of this erectile dysfunction treatment. Since Viagra influences blood flow, it can interact with specific medicines, which is why medical advice is important before use. Sildenafil lasts for around 4 hours (sometimes longer for some men). About 40% of men have erection difficulties by age 40.

GPhC Regulated Pharmacy

Generic for Viagra ® contains Sildenafil, a doctor-trusted ingredient that is effective for treating ED, which means that it is just as effective for the treatment of erectile dysfunction as the original ED medication. Generic Viagra® is a PDE5 (phosphodiesterase type 5) inhibitor, which works by blocking the PDE5 enzyme, which in turn temporarily relaxes smooth muscle and improves blood flow to the penis during sexual stimulation. While Viagra® is easily recognizable as the “little blue pill,” the generic for Viagra® comes in many different colors and shapes. Authentic pills may be white or blue, round or diamond, etc. The cost of a generic for Viagra® tablet varies based on the strength of the dose of sildenafil it contains, but generally costs anywhere from about $4 to $10 per dose, compared to $50 to $70 per dose for brand-name Viagra®.

Sildenafil: what you need to know

Through Hims, generic for Viagra® costs 95% less than branded Viagra®. Generic for Viagra ® contains Sildenafil, a doctor-trusted ingredient that is effective for treating ED. Read more about the cost of generic Viagra® and brand-name Viagra® on our blog. The Generic for Viagra ® is called Sildenafil Citrate. This means that the generic form of Viagra ® will have the same therapeutic effect, but at a lower cost Yes, generic forms of Viagra® are just as safe as Viagra®. Whatever the cause, it helps for the vast majority of men. Cost-effective, most popular, on-demand dosing Hypotension (blood pressure <90/50 mmHg), recent stroke or heart attack We’ll ask you a couple of quick medical questions.