Erectile dysfunction (ED) is incredibly common, but many men still feel unsure about where to start when exploring treatment. Two of the most well-known options, Cialis® (tadalafil) and Viagra® (sildenafil), are both safe, effective, and widely prescribed in Canada. But they don’t work exactly the same way, and those differences matter.
Understanding how each ED medication works, how long it lasts, and who it’s best suited for can help you feel more confident choosing the option that fits your lifestyle.
Before beginning any ED treatment, it’s important to consult with a qualified healthcare provider to ensure the option is safe, appropriate, and aligned with your medical needs.
Looking to see which ED treatment might be right for you? Take our online assessment.
Understanding the Basics: How Cialis® and Viagra® Work
Both Cialis® and Viagra® belong to a class of medications known as phosphodiesterase type-5 (PDE5) inhibitors. These medications help relax blood vessels in the penis and improve blood flow during sexual stimulation by supporting the nitric oxide (NO) pathway, an essential part of the body’s natural erection process.
While both medications work through this same mechanism, their onset, duration, and typical use cases differ. These distinctions can influence which option feels more natural or convenient for your lifestyle.
Cialis® vs Viagra®: Key Differences At-A-Glance
| Feature | Cialis® (tadalafil) | Viagra® (sildenafil) |
|---|---|---|
| Onset time | 30–60 minutes | 30–60 minutes |
| Duration | Up to 36 hours | Up to 6 hours |
| Use Type | Daily or as-needed | As-needed only |
| Food Interactions | Minimal | High-fat meals may reduce effectiveness |
| Best For | Flexibility, spontaneity | Planned sexual activity |
| Generic Available | Yes | Yes |
These differences—particularly timing and duration—are among the top factors men consider when comparing ED medications.
Which ED Medication Works Better—or Gets You Harder?
Many guys search online for “What gets you harder, Cialis® or Viagra®?”
Clinically, both medications are effective PDE5 inhibitors with strong research supporting their use. But effectiveness varies from person to person based on metabolism, timing, lifestyle, and other health factors.
Viagra® may be preferred if you want:
- A shorter-acting, take-when-needed ED medication option.
- A predictable 4-hour performance window.
- An ED medication that leaves your system quickly.
Cialis® may be preferred if you want:
- A long 36-hour window.
- More spontaneity.
- A low-dose daily ED medication option with continuous support.
- Confidence without needing to time your dose.
The best ED medication choice comes down to your lifestyle and personal preference.
Cialis® vs Viagra®: Dosage Differences
Viagra® (sildenafil) Dosages
- Dosage options: 50 mg and 100 mg.
- Timing: 30–60 minutes before sexual activity.
- Maximum frequency: Once per day.
Cialis® (tadalafil) Dosages
- As-needed doses: 10 mg or 20 mg, taken 30 minutes before sexual activity.
- Daily doses: 2.5 mg or 5 mg, taken once daily.
- Best for: Ongoing support and spontaneous intimacy.
Note: Daily Cialis® is particularly useful for people who want steady, consistent erectile support.
How Long Do Cialis® and Viagra® Last?
Cialis®: Up to 36 Hours
Cialis® is known for its long duration of action. This doesn’t mean an erection lasts 36 hours; rather, the medication provides extended support during sexual stimulation anywhere within that timeframe.
Viagra®: About 4 Hours
Viagra® remains active for a shorter window. Some men prefer this because it offers a more precise, predictable timeframe.
Viagra® and Cialis® Side Effects and Safety Considerations
Both Viagra® and Cialis® are generally well tolerated but can cause side effects that you should be aware of before taking them.
Possible Cialis® Side Effects
Possible Cialis® side effects may include but are not limited to the following:
- Headaches
- Muscle or back pain
- Indigestion
- Nasal congestion
- Flushing
Possible Viagra® Side Effects
Possible Viagra® side effects may include but are not limited to the following:
- Headaches
- Flushing
- Heartburn or indigestion
- Nasal congestion
Who Should Avoid ED Medications?
ED medication isn’t for everyone. Avoid Cialis® or Viagra® if you:
- Use nitrate medications.
- Have been advised to avoid sexual activity.
- Have severe liver or kidney disease.
A healthcare provider will evaluate your individual risks before prescribing ED medication.
Cialis® Cost vs Viagra® Cost in Canada
In terms of price differences between Cialis® and Viagra®, costs vary depending on dose, pharmacy, and whether you choose brand-name or generic.
General ED Medication Cost Trends
- Generic sildenafil (Viagra®) → Usually the lowest cost.
- Generic tadalafil (Cialis®) → Slightly more expensive.
- Brand-name options → Highest cost.
Most insurance plans do not cover ED medications in Canada. For most men, generics provide equal effectiveness at significantly lower cost.
ED Medication: Food and Alcohol Interactions
Viagra® and Food
Taking Viagra® with high-fat meals can delay absorption, resulting in slower onset or reduced effectiveness.
Cialis® and Food
Cialis® is less affected by food, allowing more flexibility overall.
ED Medication and Alcohol
It’s important to remember that alcohol can:
- Lower blood pressure.
- Increase dizziness.
- Reduce erectile function.
For these reasons, it’s best to limit or avoid alcohol with both ED medications.
Which ED Medication Fits Your Lifestyle?
Choose Cialis® if you want to:
- Have a long, 36-hour window.
- Enjoy flexibility and spontaneity.
- Use a daily dosing option.
- Get steady support without timing your dose.
Choose Viagra® if you want to:
- Have a fast-acting, on-demand option.
- Have a shorter duration in your system.
- Access a more affordable generic option.
- Experience a predictable, time-specific effect.
Are you still unsure about which ED medication feels right? A quick assessment can help.
How to Get Cialis® or Viagra® Online in Canada
In Canada, ED medications can be accessed safely and discreetly through licensed telehealth services such as MyRocky Health.
Here’s how it works:
- Complete a secure online medical assessment.
- Get connected with a licensed healthcare provider who will review your questionnaire.
- Receive a personalized treatment plan based on your specific health requirements.
- Choose discreet home/office delivery or pick-up at your local pharmacy.
- Enjoy ongoing clinical support if you need dose adjustments or have questions.
MyRocky is private, convenient, and fully compliant with Canadian regulations. Get started online today.
References
- ElHady, A. K. “Advancements in Phosphodiesterase 5 Inhibitors: Unveiling the Role of PDE5-Is as Disease-Modifying Agents.”
- Hua, Vivian et al. “Erectile Dysfunction: What Are the Options When PDE5 Inhibitors Fail?”
- “Phosphodiesterase 5 Receptor (PDE5) Inhibitors: Similarities and Differences.”
- Xu, B. “Combination Vardenafil and Tadalafil Drug-Induced Liver Injury.”
Disclaimer: This article is intended for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider with any questions about a medical condition or treatment.
Editorial Standards: At Rocky Health, we’ve made it our mission to support men and women with trustworthy, easy-to-understand medical and health information online. Read more about our editorial standards here.
