Viagra® (Sildenafil) Tablets for Erectile Dysfunction

What Viagra Is and How It Works

Viagra® is the brand name for sildenafil, a prescription tablet for erectile dysfunction (ED). It helps men get and keep an erection long enough for sex. Many people search to buy viagra online, and Youdrugstore makes ordering simple and secure when you have a valid prescription.

Viagra® belongs to a class called phosphodiesterase type 5 (PDE5) inhibitors. Sexual arousal releases nitric oxide in the penis. This raises cGMP, which relaxes blood vessels and increases blood flow. PDE5 breaks down cGMP. Sildenafil blocks PDE5, so cGMP can work longer. The result is improved erectile response with stimulation.

Youdrugstore is a licensed Canadian pharmacy in Manitoba that follows Canadian pharmacy standards. Our pharmacists review every prescription before we dispense your medicine. We offer brand and generic options at Canadian prices, and we also carry over-the-counter health products.

We partner only with licensed, vetted international pharmacies to source authentic brand medicines, maintain a broad selection, and keep prices affordable.

Dosage and Usage

Viagra® is taken as needed for ED. Follow your prescriber’s directions and the package instructions.

• Start with 50 mg taken about 1 hour before sexual activity.
• Your dose may be adjusted to 25 mg or 100 mg based on response and side effects.
• Do not take more than one dose in 24 hours.
• Take on an empty stomach for a faster effect; a high-fat meal may delay onset.
• Sexual stimulation is required for Viagra® to work.

Missed dose: Viagra® is used when needed, so there is no daily dose to make up.

Storage and travel:

• Store at room temperature, 20–25°C (68–77°F), away from moisture.
• Keep tablets in the original packaging, out of reach of children and pets.
• When traveling, carry in your hand luggage with the label intact.
• Do not use expired tablets or tablets with damaged packaging.

Benefits and Savings

Viagra® helps improve erectile function in men with ED. Many patients report reliable erections, better control, and improved confidence during sexual activity. The dosing is flexible, so most men find a dose that balances effect with tolerability.

Ordering through Youdrugstore offers strong value. We routinely see 60–80% savings compared to typical US prices, especially for multi-month supplies. Our team can set gentle reorder reminders so you do not run out. Customer-service chat is available during posted office hours, and our pharmacists can address medication questions.

Side Effects and Safety

Most side effects are mild and pass as your body adjusts. Contact a prescriber if symptoms are bothersome or do not go away. Get urgent help for severe reactions.

• Common: headache, flushing, indigestion, nasal congestion, dizziness.
• Less common: back pain, muscle aches, nausea, dry mouth.
• Visual effects: color tinge (blue/green), blurred vision, light sensitivity.
• Serious: chest pain, fainting, sudden vision or hearing loss, seizure, allergic reaction.
• Priapism: a painful erection lasting longer than 4 hours needs immediate care.

Do not use Viagra® with nitrates (nitroglycerin) or nitric oxide donors. This can cause a dangerous drop in blood pressure. Avoid use with riociguat. Use caution with alpha-blockers and certain antihypertensives. Alcohol and cannabis may increase dizziness. Grapefruit can raise sildenafil levels and increase side effects.

People with severe heart disease, recent stroke or heart attack, uncontrolled blood pressure, significant liver or kidney disease, bleeding disorders, stomach ulcers, or certain eye conditions (including NAION or retinitis pigmentosa) may not be candidates. Tell your prescriber about all medicines and supplements you use.

Onset Time

Most men feel an effect within 30 to 60 minutes. A high-fat meal can slow absorption and delay onset by up to an hour. The effect usually lasts 4 hours or more, though response varies. Plan ahead, and allow time for arousal.

Compare With Alternatives

Generic sildenafil contains the same active ingredient as Viagra® at 25 mg, 50 mg, and 100 mg strengths. Many patients choose the generic for lower cost and similar clinical effect. If you prefer a brand alternative with a longer duration, tadalafil may suit your routine.

Cialis® (tadalafil) can last up to 36 hours and is available for as-needed or daily use, which some find convenient. It may also help urinary symptoms from BPH. Sildenafil (generic Viagra) offers strong value and the same active ingredient as the brand. Vardenafil is another PDE5 option not listed here; some patients respond differently to each agent.

For pulmonary arterial hypertension, sildenafil is prescribed as 20 mg tablets (Revatio), taken multiple times daily. This is a different dosing regimen and product; do not substitute ED tablets for that use.

Combination Therapy

ED often has multiple contributing factors. A clinician may combine a PDE5 inhibitor with counseling, management of medical conditions, or lifestyle changes. Testosterone replacement therapy may be considered when true hypogonadism is diagnosed. Do not combine Viagra® with other PDE5 inhibitors, nitrates, or recreational nitrites. Discuss any alpha-blocker use to reduce the risk of low blood pressure.

Patient Suitability and Cost-Saving Tips

Viagra® is for adult men with ED. It is not approved for women or children. Some men respond better to a different dose or a different PDE5 inhibitor. If you need longer duration, tadalafil 20mg may be discussed with your prescriber. If side effects limit use, a lower dose or an alternative may help.

Ways to reduce your Viagra cost:

• Compare brand and generic viagra options; generic is often less expensive.
• Choose larger quantities. Multi-month supplies can lower the per-month price.
• Set reorder reminders so you can avoid urgent, small orders.
• Ask your prescriber about a suitable dose; fewer tablets per month may be possible.

For current offers and bulk options, see our sale page.

If you are new to ED treatment, you may find our article Early Erectile Dysfunction Symptoms To Watch For helpful. To understand tadalafil’s longer window, read What Is Tadalafil The Ed Medication You Should Know About. If you prefer a deep dive into this product, see Viagra® Pill How It Works Benefits And Side Effects.

Explore condition pages like Erectile Dysfunction and related conditions such as Pulmonary Hypertension to learn more about diagnosis and treatment paths.

Authoritative Sources

Review the manufacturer’s guidance on the Pfizer Viagra patient site. See Canadian product information in the Health Canada Drug Product Database. For US labeling, consult the FDA Prescribing Information for Viagra.

Order from Youdrugstore with confidence. Our team reviews your prescription, answers questions, and ships to the US with prompt, express, cold-chain shipping when required.

This content is for general education. It does not replace personalized medical advice. A valid prescription is required. Do not use Viagra® with nitrates or if a prescriber has advised against sexual activity. Keep medicines out of children’s reach.