Erectile Dysfunction · Canada

Sildenafil vs Tadalafil:
Choosing between on-demand and daily ED treatment

A detailed breakdown for Canada — including efficacy, cost, side effects, and how to get a prescription online.

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Sildenafil vs Tadalafil — At a Glance

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Sildenafil

PDE5 inhibitor

Approved forErectile Dysfunction

Dose25mg, 50mg, 100mg as needed

Avg resultN/A

Est. cost$1.50–$4 per dose

Insurance (CA)Rarely in Canada

✓ Pros

✓Lowest per-dose cost

✓Fast onset (30–60 min)

✓Most studied ED medication

✓Available as generic

✗ Cons

✗Effects limited to 4–6 hours

✗Best taken on empty stomach

✗More food/alcohol interaction

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Tadalafil

PDE5 inhibitor

Approved forED + Benign Prostatic Hyperplasia

Dose10–20mg as needed; 2.5–5mg daily

Avg resultN/A

Est. cost$2–$5 per dose; $1–$2/day (daily)

Insurance (CA)Rarely in Canada

✓ Pros

✓36-hour window ('weekend pill')

✓Daily dosing option for continuous readiness

✓Less food interaction

✓Also treats BPH

✗ Cons

✗More expensive per dose

✗Slower onset for some

✗Daily dosing adds up in cost

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Our Verdict

Sildenafil is ideal if you want the lowest cost per dose and plan to use it occasionally. Tadalafil's 36-hour window offers more spontaneity, and daily tadalafil 5mg eliminates the need to plan around doses entirely — making it the preferred option for many men. Talk to your provider about which lifestyle fits best.

⚕️ This comparison is for informational purposes only. Consult a licensed physician before choosing any medication. Individual responses vary.

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Common Questions

Which works faster, sildenafil or tadalafil?

Both typically take 30–60 minutes. Sildenafil can sometimes act faster when taken on an empty stomach. Tadalafil's onset is generally consistent regardless of food intake.

Can I take sildenafil and tadalafil together?

No. Combining PDE5 inhibitors significantly increases the risk of dangerous blood pressure drops. Always use one or the other as prescribed by your physician.

Is daily tadalafil safe long-term?

Yes. Daily tadalafil 5mg has been studied extensively for long-term use and is approved for this indication. It maintains consistent levels in the bloodstream, which many men find more convenient than on-demand dosing.