Genetix Viagra
Sildenafil
$2.64 per tablet
Genetix Viagra: Sildenafil citrate, 30 mg per tablet, 50 tablets. Ships from inside Canada in plain packaging, with tracking within 72 hours; free Canada Post shipping over $300.
- Compound
- Sildenafil citrate
- Strength
- 30 mg per tablet
- Pack
- 50 tablets
- Total per order
- 1,500 mg
- Half-life
- About 4 hours
- Form
- Tablets
About Genetix Viagra
Sildenafil (Viagra) is the original PDE5 inhibitor for erectile dysfunction. It starts working in about an hour and lasts around 4–5 hours.
Genetix Pharma: Each order is 50 tablets, 30 mg each (1,500 mg in total).
Commonly used for
- Erectile dysfunction
- Medical: pulmonary arterial hypertension (different brand and dose)
Compound profile
- Formula
- C28H38N6O11S
- Molecular weight
- 666.7 g/mol
- CAS number
- 171599-83-0
- PubChem
- CID 135413523
How it works
It blocks PDE5 so blood vessels in the penis stay relaxed during arousal. Without stimulation, nothing happens.
Half-life: about 4 hours.
Release profile
How levels rise and fall after a single dose, based on a half-life of about 4 hours. Each mark on the axis is one half-life; after about five, almost none is left.
An illustration from the half-life only; real levels vary with dose, food, how quickly it is absorbed and the person.
Clinical reference dose
Clinical reference: the label starting dose is 50 mg about an hour before sex, adjusted between 25 and 100 mg, at most once a day.
Tablets here are 30 mg each.
A heavy, fatty meal delays it.
These are reference amounts from labels and clinical studies, not a personal recommendation. A doctor sets the right dose for you, using your bloodwork.
Measuring calculator
Enter the amount you have been prescribed or are working from, and this works out exactly what to measure from this product. It doesn’t suggest an amount.
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Arithmetic only, from the strength on this product’s label. Check the label on your vial or bottle, follow your prescriber, and ask a pharmacist if you’re unsure how to measure.
Compare brands
Same compound, different makers. Compare the strength, pack and cost per unit.
| Product | Strength | Pack | Price | Value | Buy |
|---|---|---|---|---|---|
| Genetix ViagraYou are here | 30 mg per tablet | 50 tablets | $132 | $2.64 per tablet | |
 Zionova Viagra 50mg★ 4.97 · 32 | 50 mg per tablet | 50 tablets | $132 | $2.64 per tablet | Add |
Combinations and interactions
Often compared or used with
- Compared with tadalafil (Cialis), which lasts up to 36 hours.
- Never take two ED medicines on the same day.
Interactions to know
- Nitrates and “poppers”: dangerous blood-pressure drop. Never combine.
- Alpha-blockers: dizziness and fainting.
- Ritonavir, ketoconazole, erythromycin: raise sildenafil levels.
Tell your doctor and pharmacist about everything you take, including supplements, before adding anything new.
Side effects and risks
Headache and flushing
The most common side effects.
Vision tint
A blue tint or light sensitivity for a few hours.
Priapism
An erection lasting over 4 hours is an emergency.
Sudden vision or hearing loss
Rare; stop and seek help.
Take nitrates, have been told sex is unsafe for your heart, recently had a heart attack or stroke, or have very low blood pressure.
In Canada: Sildenafil citrate is a prescription drug in Canada. Talk to a doctor or pharmacist about whether it is right for you.
Bloodwork checklist
- Blood pressure, sitting and standing
- Lipid panel and fasting glucose (ED can be an early sign of heart disease)
- Testosterone if libido is also low
Your family doctor can order these, or you can pay for private testing at labs such as LifeLabs or Dynacare. Test before you start, after 6–8 weeks, and again after you stop.
Common questions
How long does it last?
Most of the effect is within 4–5 hours.
How fast does it ship?
Orders ship from inside Canada with a tracking number within 72 hours of payment. Weekend orders are packed on Sunday or Monday. Canada Post Xpresspost takes 2–5 business days to most cities; UPS or FedEx is faster. Shipping is free by Canada Post over $300 and by UPS or FedEx over $1,000.
How is it packaged?
In a plain box with no product names or branding on the outside.
Is sildenafil citrate legal in Canada?
Sildenafil citrate is a prescription drug in Canada. Talk to a doctor or pharmacist about whether it is right for you.
Sources
- Oral sildenafil in the treatment of erectile dysfunction. Sildenafil Study GroupGoldstein I et al. · N Engl J Med · 1998 · PMID 9580646
- Phosphodiesterase Type 5 Inhibitors and Oral Nitrates in Male Patients with Ischemic Heart DiseaseMorrisette MJ, Dunn SP · Curr Cardiol Rep · 2023 · PMID 37074567
Chemical data and structures: PubChem, U.S. National Library of Medicine. Protein sequences: UniProt.
Specifications
| Compound | Sildenafil citrate |
|---|---|
| Strength | 30 mg per tablet |
| Pack | 50 tablets |
| Total per order | 1,500 mg |
| Half-life | About 4 hours |
| Form | Tablets |
| Brand | Genetix Pharma |
| SKU | Viagra Genetix |
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This information is educational and is not medical advice. Talk to a doctor or pharmacist before using any hormone, peptide or prescription drug. For adults 18+ only.