Concise the essentials at a glance and essential facts

Sildenafil is the active ingredient in many medicines for erectile dysfunction (ED). It is part of the phosphodiesterase type 5 inhibitor group, commonly shortened to PDE5 inhibitors.

Licensed purpose: treatment of ED in adult men. Age restriction: medicines containing sildenafil are intended for use by people aged 18 or over.

Tablet strengths commonly encountered in the UK include 25 mg, 50 mg and 100 mg. A pharmacy-only option is sildenafil 50 mg sold as Viagra Connect.

Typical onset and duration: many men notice an effect in 30 to 60 minutes, and a single dose of sildenafil commonly lasts about 4 to 6 hours. Food, particularly fatty meals, can delay how quickly it starts to work.

  • Sildenafil increases blood flow to the penis once sexual stimulation is present; it does not itself create sexual desire.
  • Kamagra branded tablets advertised online are often unlicensed for UK sale and carry risks; see the legal matters section below for more information, download the information packet.
  • Only use sildenafil products that are supplied by a registered pharmacy or prescribed by a clinician.

Explaining how sildenafil works

Sildenafil inhibits the PDE5 enzyme in erectile tissue. When sexual stimulation triggers nitric oxide release, sildenafil helps maintain higher levels of cyclic GMP in the penis. This promotes dilation of blood vessels in the corpora cavernosa and supports erection. Adequate sexual stimulation is required for sildenafil to have an effect.

Dose and administration method

Follow the medication dosing guidelines provided by your prescriber or pharmacist. A common initial dose for many men is 50 mg taken about one hour before sex. Based on response and tolerability, your clinician may adjust the dose to 25 mg or 100 mg.

  • Do not take more than a single dose in any 24 hour span.
  • A large fatty meal may slow onset and reduce peak effect.
  • If unsure which dose is right for you, consult a healthcare professional before changing how you take the medicine.

Avoid taking sildenafil on the same day as other PDE5 inhibitors or other ED medicines unless you have explicit clinical advice permitting a combination or sequencing.

Essential safety measures before starting

Before you take charge sildenafil tell your prescriber about any relevant medical issues so they can judge whether it is safe for you. Common points to discuss include:

  • Allergy to sildenafil or any ingredient in the tablet
  • Significant heart disease, recent heart attack or stroke, unstable angina or serious arrhythmias
  • Very low or uncontrolled high blood pressure
  • Recent or unexplained vision changes; history of non-arteritic anterior ischemic optic neuropathy
  • Blood disorders such as sickle cell disease, leukemia or multiple myeloma
  • Penile deformities or conditions that increase the risk of prolonged erection (priapism)
  • Moderate to severe liver or kidney impairment
  • Current cancer treatments or other complex therapies

Practical measures to reduce medication side effects:

  • Rise slowly from sitting or lying to limit dizziness.
  • Limit alcohol when you plan to take sildenafil to avoid excessive drowsiness or reduced response.
  • Bring a complete list of all medications, herbal remedies and supplements to any consultation.

Conditions precluding use

  • History of allergy to sildenafil or to any excipient in the product.
  • Concomitant use with organic nitrates or nitric oxide donors in any form, since this combination can cause a severe and immense potentially dangerous drop in blood pressure.
  • Not indicated for use in people under 18 years of age.

Expected minor side effects and warning indicators

Most indirect effects are light and short in duration. Frequently reported effects include:

  • Headache episode
  • Facial erythema
  • Nasal passage blockage
  • Lightheadedness or a dizzy sensation
  • Dyspepsia or stomach upset

Less likely to appear but more serious events can occur. Seek urgent medical help if you experience sudden vision loss, sudden hearing loss, chest pain, fainting, severe allergic reaction or an erection lasting longer than four hours (priapism).

Medication risk factors in people engage through a series of interactions among individualss. you should note

Sildenafil must not be taken with any product that contains nitrates. It is mainly metabolised by CYP3A4, so medications that inhibit or induce this enzyme can change sildenafil levels and effects.

Examples of medicines that can interact include the following (not exhaustive):

  • Protease inhibitors and other antiretrovirals used for HIV care
  • Strong CYP3A4 inhibitors such as ketoconazole and itraconazole
  • Rifampicin and some anticonvulsants that are strong enzyme inducers
  • Macrolide antibiotics including erythromycin and clarithromycin
  • Certain alpha-blockers like doxazosin or terazosin that can also lower blood pressure
  • All forms of organic nitrates, including GTN sprays and tablets

Always provide a full list of medicines to your prescriber or pharmacist before you do anything else sildenafil. For related legal and safety risks to assess, see status of being legally recognized and supply in the UK.

If a dose is missed, follow this advice

Sildenafil for ED is normally taken as required rather than on a daily schedule, so the concept of a missed regular dose rarely applies. Adhere to the maximum dosing frequency advised by your clinician and do not take extra doses to make up for a missed occasion.

Overdose tragedy care and emergency actions

If someone has taken too much sildenafil they may have severe dizziness, fainting, prolonged erection, nausea, chest pain or an irregular heartbeat. In that case contact emergency services or swing by to the nearest emergency department immediately.

Storing and handling procedures

  • Keep tablets in their original container or blister until use.
  • Store at ordinary room temperature, away from excessive heat, moisture and direct sunlight.
  • Do not allow children or pets to see or reach this.

Check prices from multiple sellers and multiple options in the United Kingdom

There are several licensed additional choices to unregulated online products. Prices vary by brand, strength, pack size and whether you obtain medicines via the NHS or privately. Figures below are approximate and may change.

  • Viagra Connect (sildenafil 50 mg, pharmacy sale): typically about 19 to 25 GBP for 4 tablets, and around 35 to 45 GBP for 8 tablets; a pharmacist consultation is required.
  • Generic sildenafil (prescription): private retail prices can be in the region of 0.50 to 2.00 GBP per 50 mg tablet; NHS prescriptions depend on eligibility and prescription charges (England prescription charge approx 9.35 GBP per item at the time of writing).
  • Tadalafil (Cialis) 10 mg or 20 mg: private costs often range from 2 to 8 GBP per tablet; tadalafil has a longer duration and can be used daily at lower doses or as needed.
  • Vardenafil (Levitra) and avanafil (Spedra): private prices commonly vary between about 2 and 10 GBP per tablet depending on strength and brand.

Quick practical comparisons:

  • Onset: sildenafil, vardenafil and avanafil usually act within 30 to 60 minutes; tadalafil may take up to 120 minutes in some users.
  • Duration: tadalafil often lasts the longest (up to 36 hours in some cases); sildenafil and vardenafil usually around 4 to 6 hours; avanafil may sustain effect for roughly 6 hours.
  • Food the back and forth between peoples are the heartbeat of social platforms.: high-fat meals can slow sildenafil and vardenafil more noticeably than avanafil or tadalafil.

Unlicensed products promoted as Kamagra may be cheaper in adverts (for example 1 to 3 GBP per tablet), but they are frequently counterfeit, substandard or contaminated coupled with their sale in the UK is often illegal. For safety buy from a GPhC-registered pharmacy or obtain a prescription through recognised clinical services. If in doubt, consult a pharmacist.

Used in athletic contexts

Sildenafil is not listed as a prohibited substance by the World Anti-Doping Agency at present. Athletes should nevertheless check rules for their sport and discuss use with team medical staff before taking any medication. Sildenafil is not viewed as an ergogenic aid for training and should only be used for legitimate medical reasons.

Frequently asked Qs

Is drinking alcohol compatible with sildenafil?

Small amounts of alcohol are unlikely to be harmful, but alcohol can increase dizziness, lower blood pressure and reduce erectile response. It is sensible to limit alcohol around the time you take sildenafil.

What if the first use of sildenafil is ineffective?

Some men need several attempts to determine whether sildenafil is effective for them. Ensure adequate sexual stimulation, avoid large meals near dosing and discuss dose changes or a substitute method remedies with your clinician if you do not get the desired response.

Can I take sildenafil with other ED medicines?

No. Do not join. sildenafil with other PDE5 inhibitors or ED treatments on the same day unless a prescriber specifically advises this.

Do Kamagra and Viagra have the same active ingredient?

Some Kamagra products claim to contain sildenafil, but the crucial difference is regulatory approval and quality assurance. Viagra and licensed generic sildenafil supplied in the UK meet MHRA standards. Kamagra items sold online are often unlicensed and may be unsafe or illegal to buy here.

For more detail, see the section on legal authorization status and supply in the UK or speak to a pharmacist.

Additional aspects about Kamagra