Sexual Health Sildenafil (Viagra)
- Form
- Tab
- Sizes
- 100mg × 100 Tabs, 100mg × 24 Tabs, 100mg × 10 Tabs, 100mg × 4 Tabs, 160mg × 100 Tabs, 120mg × 5 Tabs, 160mg × 4 Tabs, 50mg × 100 Tabs
- Price (per bottle)
- 30 - 210 EUR
Product Comparison
Sildenafil (Viagra) vs Tadalafil (Cialis)
Viagra (Sildenafil, 4h) versus Cialis (Tadalafil, 36h). Fast onset versus long half-life.
Sexual Health 
Sexual Health Tadalafil (Cialis)
- Form
- Tab
- Sizes
- 20mg × 100 Tabs, 80mg × 10 Tabs, 5mg × 100 Tabs, 60mg × 10 Tabs, 10mg × 100 Tabs
- Price (per bottle)
- 45 - 130 EUR
By the numbers
Number of sizes Sildenafil (Viagra): 8 Tadalafil (Cialis): 5
Smallest size Sildenafil (Viagra): 50 mg Tadalafil (Cialis): 5 mg
Largest size Sildenafil (Viagra): 160 mg Tadalafil (Cialis): 80 mg
Price from (per bottle) Sildenafil (Viagra): 30 EUR Tadalafil (Cialis): 45 EUR
Price up to (per bottle) Sildenafil (Viagra): 210 EUR Tadalafil (Cialis): 130 EUR
Values from the sizes and catalogue prices on this page, without Express and discounts.
Half-life compared
How quickly do they break down?
Share left after one dose, calculated from the half-lives in the lexicon
Sildenafil (Viagra)no exact figure in the lexiconTadalafil (Cialis)~17.5 hours
Half-life ~17.5 hours
After 35 hours: 25 %
| Product | Half-life | Hour 17.5 | Hour 35 | Hour 70 |
|---|---|---|---|---|
| Tadalafil (Cialis) | ~17.5 hours | 50 % | 25 % | 6.3 % |
Simplified model without an absorption phase, half-lives from the TPD lexicon. Sildenafil (Viagra) has no half-life in the lexicon, so it has no curve.
| Feature | Sildenafil (Viagra) | Tadalafil (Cialis) |
|---|---|---|
| Category | Sexual Health | Sexual Health |
| Subcategory | Sexual Health | Sexual Health |
| Form | Tab | Tab |
| Price range | 30 - 210 EUR | 45 - 130 EUR |
| GLP-1 | No | No |
Quick reference
What both have in common
- Same subcategory: Sexual Health - addressed via overlapping mechanisms.
- Same main category: Sexual Health / Sexual Health
This page is a high-level comparison for community discussion only. Refer to the linked detail pages for full descriptions, risk profiles and peer-reviewed studies. Not medical advice.
