Common Side Effects and Safety Profile of Sildenafil

Best for free visits: Hims Skip to review Best for same-day prescriptions: Numan Skip to review Best for fast consultations: MedExpress Skip to review Best for choice of quantity: Lloyds Pharmacy Skip to review Best for Click & Collect: Superdrug Online Doctor Skip to review Best for loyalty points: Boots Skip to review People do not need a prescription to buy Viagra or generic Viagra in the United Kingdom.

Society and culture

J Neurol Neurosurg Psychiatry 2001; 71(3): 371–374.CrossRefGoogle ScholarPubMed Raffaele, R, Vecchio, I, Giammusso, B, Morgia, G, Brunetto, MB, Rampello, L. Efficacy and safety of fixed-dose oral sildenafil in the treatment of sexual dysfunction in depressed patients with idiopathic Parkinson’s disease. Eur Urol 2002; 41(4): 382–386.CrossRefGoogle ScholarPubMed Sildenafil citrate (Viagra) for the treatment of erectile dysfunction in men with Parkinson’s disease. Mov Disord 2000; 15(2): 305–308.3.0.CO;2-W>CrossRefGoogle ScholarPubMed Bethesda: American Society of Health-System Pharmacists. Accessed on 31 December 2022 via Scholar Management of sexual dysfunction sildenafil pricing in Parkinson’s disease.

What Is Generic Sildenafil?

Ther Adv Neurol Disord 2011; 4(6): 375–383.CrossRefGoogle ScholarPubMed Accessed on 31 December 2022 via Scholar Salonia, A, Rigatti, P, Montorsi, F. Sildenafil in erectile dysfunction: a critical review. Curr Med Res Opin 2003; 19(4): 241–262.CrossRefGoogle ScholarPubMed London: The Royal Pharmaceutical Society of Great Britain. Accessed on 31 December 2022 via Scholar Truven Health Analytics, Greenwood Village, Colorado, USA. Accessed on 31 December 2022 via Scholar Copyright © 2022, Treasure Island (FL): StatPearls Publishing LLC.Google Scholar Summary of product characteristics – Viagra 25 mg film-coated tablets. Pharmacists can dispense this medication over the counter (OTC).

User Name	Reported Effectiveness	Satisfaction Level	Common Complaints	Noted Advantages	Age Group
John D.	Very effective	4.5/5	Mild headache	Fast action	35-45
Liam P.	Effective for ED	4.0/5	Dizziness	Affordable prices	25-35
Sarah K.	Moderate results	3.8/5	Nose congestion	Discreet online purchase	25-35
Mark L.	Not effective	2.0/5	No effect	N/A	45-55
Emma R.	Very satisfied	4.7/5	None	Quick delivery	30-40

While the National Health Service (NHS) does prescribe the generic version of Viagra (sildenafil), some people may prefer to purchase the branded medication online through pharmacies or telehealth services.

Product	Dosage	Quantity + Bonus	Price
Kamagra Oral Jelly	100mg	10 Sachets	54.55€ 51.95€	Buy
Kamagra Polo	100mg	272 + 12 Pills	622.94€ 593.28€	Buy
Viagra Generic	25mg	360 + 10 Pills	213.68€ 203.50€	Buy
Viagra Generic	100mg	60 + 4 Pills	96.36€ 91.77€	Buy
Viagra Generic	100mg	360 + 10 Pills	330.21€ 314.49€	Buy
Kamagra Soft Tabs	100mg	84 + 4 Pills	233.05€ 221.95€	Buy
Viagra Generic	200mg	30 + 2 Pills	83.07€ 79.11€	Buy
Kamagra Polo	100mg	32 Pills	125.88€ 119.89€	Buy
Viagra Generic	25mg	270 + 8 Pills	184.26€ 175.49€	Buy
Kamagra Soft Tabs	100mg	12 Pills	57.55€ 54.81€	Buy
Kamagra	100mg	12 Pills	55.64€ 52.99€	Buy

Online services generally offer a quicker and more convenient way to get Viagra online.

Please complete the below form to place your order.

Viagra Connect has the same side effect profile as both Viagra and generic sildenafil. Some of these side effects can be found in the table below, and for a full list of side effects, please read the Patient Information Leaflet found in each box.2 Find the clinically proven ED treatment that suits you best. Specialists in medicine, nutrition, performance, and diagnostics. BSc (Hons) MBBS MRCGP AFHEA MA (Hons) AFMCP Viagra Connect 50 mg film-coated tablets. Viagra Connect 50 mg film-coated tablets.

A doctor or nurse practitioner will message you within 1 day

The Movement Disorders Prescriber's Guide to Parkinson's Disease , pp. 459 - 472Publisher: Cambridge University PressPrint publication year: 2025 Bernard, BA, Metman, LV, Levine, L, Ouyang, B, Leurgans, S, Goetz, CG. Sildenafil in the treatment of erectile dysfunction in Parkinson’s disease. Mov Disord Clin Pract 2017; 4(3): 412–415.CrossRefGoogle ScholarPubMed Hussain, IF, Brady, CM, Swinn, MJ, Mathias, CJ, Fowler, CJ. Treatment of erectile dysfunction with sildenafil citrate (Viagra) in parkinsonism due to Parkinson’s disease or multiple system atrophy with observations on orthostatic hypotension. However, it will likely be more expensive than going through a person’s general practitioner (GP) and receiving a prescription through the NHS.

other ED treatments

If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox. Find out more about saving content to Google Drive. Book: The Movement Disorders Prescriber's Guide to Parkinson's Disease Viagra (sildenafil) for erectile dysfunction is available in the United Kingdom over the counter and online. Buying Viagra from telehealth services may be more convenient and faster than using an NHS general practitioner, but it is likely to be more expensive. Many telehealth services and online pharmacies offer Viagra online. Some, but not all, may require a consultation with a healthcare professional before posting the medication or allowing people to pick it up from their local pharmacy.

• Buying sildenafil online in Ireland requires understanding of local laws.
• Use reputable review platforms to verify the credibility of online pharmacy sites.
• Never share personal or banking details on insecure websites.
• Online sildenafil orders can sometimes include additional health advice.
• Verify the authenticity of sildenafil packaging upon delivery.
• Store sildenafil in a secure, child-proof container.
• Some online pharmacies offer consultation with licensed doctors.
• Sildenafil can improve sexual performance but does not cure underlying issues.
• Monitor side effects closely when using sildenafil purchased online.
• Price comparisons online can help find the best deals on sildenafil.
• Always adhere to medical advice when using sildenafil for ED.

The most common form of Viagra that people can buy online is Viagra Connect, a Viagra tablet that comes in 50 milligrams (mg) strength. The Medicines and Healthcare products Regulatory Authority reclassified this product as suitable for OTC sale in 2017. Medication options: prescription sildenafil, nonprescription Viagra Connect Prescription needed: for all ED medication apart from Viagra Connect Hims is a telehealth company that offers consultations with licensed healthcare professionals and subscription prescription and nonprescription medication, including Viagra and sildenafil.

What Is the Difference Between Viagra and Sildenafil?

Erectile dysfunction (ED) is the inability to achieve or maintain an erection firm enough for sexual intercourse. It's a common condition that can affect men of all ages. Our ED category offers a variety of treatment options. We stock Sildenafil, the generic equivalent to Viagra, for purchase after a consultation with our pharmacy team. Viagra Connect is also available, a pharmacy-only medication containing Sildenafil for suitable patients.

Use Authorised EU Online Pharmacies

When you get aroused, your body produces a molecule called cGMP which helps to stimulate an erection by increasing blood flow to the penis.1 All content on this page has been medically reviewed by: Hassan Thwaini, Clinical Pharmacist and Copywriter, Master of Pharmacy (MPharm) on 30 March, 2026. Viagra Connect was the first erectile dysfunction (ED) treatment available in the UK without a prescription. It contains sildenafil, the same active ingredient found in prescription Viagra, which is a medicine that’s been trusted by millions of men worldwide since it first came to market in the late 1990s. Launched as an over-the-counter option in 2018, Viagra Connect was developed to make ED treatment more accessible and discreet. Instead of needing a GP appointment, it can now be purchased directly following a short consultation or assessment with a pharmacist. The service offers Viagra Connect as an OTC medication, starting from £5.83 per use. Sildenafil, the generic version of the drug, is slightly less expensive, starting from £2.25 per use.

Fáilte - Welcome

Viagra Connect, which contains sildenafil, typically takes around 30-60 minutes to start working and lasts for up to 4 hours.1 When you get aroused, your body produces a molecule called cGMP which helps to stimulate an erection by increasing blood flow to the penis.1 However, for people experiencing erectile difficulties, an enzyme known as PDE5 normally breaks cGMP down, restricting blood flow and causing the erection to subside.1 Viagra Connect blocks the action of PDE5, allowing more blood to flow to the penis. The resulting erection is firmer and usually lasts long enough to allow for satisfying sex.1 The difference between Viagra and Viagra Connect is that Viagra is only available via a prescription, whereas Viagra Connect can be bought over the counter without a prescription. We’re a holistic health platform built to help you take control, with treatment, guidance, and ongoing support that actually works. When you choose Viagra Connect with Numan, you’re not just getting medication, but complete care designed to help you perform your best. Complete a Numan Erectile Dysfunction Blood Test to uncover underlying causes such as low testosterone or cardiovascular risk factors, so you can get more effective treatment.

Understanding Erectile Dysfunction:

Get access to our doctors and clinicians should you require any medical help with your treatment. If hormone issues related to erectile dysfunction are suspected, Numan offers access to a dedicated team who provide personalised treatment, monitoring, and support. All treatments are shipped quickly for free, in discreet packaging directly to your desired address. And if plans change, so can your delivery, all online. With thousands of successful patients behind us, our approach is tried, tested, and trusted. Viagra Connect is only available as a 50 mg pill. Sildenafil is available in 50 mg and 100 mg strengths. Even though Viagra Connect is an OTC option, people will need to have an initial consultation with a healthcare professional before being able to order the medication online. People will need to complete an online questionnaire.

Route of administration

Electronic Medicines Compendium: Viagra 25 mg film-coated tablets – summary of product characteristics (SmPC) – (emc). Accessed on 31 December 2022 via Scholar Accessibility compliance for the HTML of this chapter is currently unknown and may be updated in the future. To save this book to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Jet lag research

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply. Find out more about the Kindle Personal Document Service. Book: The Movement Disorders Prescriber's Guide to Parkinson's Disease To save content items to your account, please confirm that you agree to abide by our usage policies. Hims will connect them to a licensed healthcare professional who will review the questionnaire and recommend appropriate treatment. Then, the company will post the medication directly to a person’s home for free in discreet packaging. Hims states that a person’s initial consultation is free.

• Sildenafil is often used as part of treatment plans for erectile dysfunction.
• Online sources of sildenafil may offer discounts or bulk buy options.
• Check if the online pharmacy provides a licensed pharmacist consultation.
• Sildenafil should be used with caution by individuals taking heart medications.
• The typical onset of sildenafil is within 30-60 minutes.
• Sildenafil is not recommended for recreational use or without medical guidance.
• Explore online forums for user experiences with sildenafil in Ireland.
• Confirm if the online pharmacy complies with Irish health standards.
• Generally, sildenafil is safe when used as directed by a healthcare provider.
• Avoid alcohol consumption when taking sildenafil to reduce side effects.
• Keep sildenafil away from heat sources and direct sunlight.

Any further consultations regarding the same prescription are available at no extra cost. offers a free initial consultation, with any extra visits with the same prescription at no extra cost healthcare professionals are available to answer any questions and concerns people cannot buy Viagra Connect without signing up for a consultation Hims is a subscription service, which may not be appealing to those who do not want Viagra long term Medication options: prescription sildenafil, nonprescription Viagra Connect Prescription required: for all ED medications apart from Viagra Connect Numan offers several ED medications, including Viagra Connect and prescription sildenafil.