Comparing Viagra vs Cialis
Viagra | Cialis |
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Viagra (sildenafil) | Cialis (tadalafil) |
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Prescription only
Viagra is used to treat erectile dysfunction (ED), but will not have any effect in the absence of sexual stimulation. A headache, stomach upsets, and flushing are the main side effects. Prescribed... View more |
Prescription only
Cialis is used to treat erectile dysfunction (ED) and to reduce symptoms of benign prostatic hyperplasia (BPH). One 'as needed' tablet lasts for 36 hours or Cialis is available as a lower dosage... View more |
Related suggestions Erectile Dysfunction
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More about Viagra (sildenafil) | More about Cialis (tadalafil) | ||||||||||||||||
Ratings & Reviews | |||||||||||||||||
Viagra has an average rating of 8.5 out of 10 from a total of 255 ratings on Drugs.com. 83% of reviewers reported a positive effect, while 9% reported a negative effect. |
Cialis has an average rating of 8.5 out of 10 from a total of 548 ratings on Drugs.com. 83% of reviewers reported a positive effect, while 9% reported a negative effect. |
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Drug Class | |||||||||||||||||
Side Effects | |||||||||||||||||
See also: Viagra side effects in more detail. |
See also: Cialis side effects in more detail. |
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Generic Availability | |||||||||||||||||
Pricing and Coupons * Prices are without insurance | |||||||||||||||||
View all Viagra prices |
View all Cialis prices |
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Dosage Forms Available | |||||||||||||||||
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Brand Names | |||||||||||||||||
Other sildenafil brands include: Liqrev, Revatio | Other tadalafil brands include: Adcirca, Alyq, Chewtadzy, Tadliq | ||||||||||||||||
Half Life The half-life of a drug is the time taken for the plasma concentration of a drug to reduce to half its original value. | |||||||||||||||||
4 hours |
17.5 hours |
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CSA Schedule ** View glossary of terms | |||||||||||||||||
Not a controlled drug
Is not subject to the Controlled Substances Act. |
Not a controlled drug
Is not subject to the Controlled Substances Act. |
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Pregnancy Category | |||||||||||||||||
Category B
No proven risk in humans
See the full pregnancy warnings document. |
Category B
No proven risk in humans
See the full pregnancy warnings document. |
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Drug Interactions | |||||||||||||||||
A total of 339 drugs are known to interact with Viagra:
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A total of 312 drugs are known to interact with Cialis:
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Alcohol/Food/Lifestyle Interactions | |||||||||||||||||
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Disease Interactions | |||||||||||||||||
First Approval Date | |||||||||||||||||
March 27, 1998 |
November 21, 2003 |
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WADA Class View World Anti-Doping Agency classifications. | |||||||||||||||||
N/A |
N/A |
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More Information | |||||||||||||||||
Patient resources | |||||||||||||||||
Professional Resources | |||||||||||||||||
Related Treatment Guide | |||||||||||||||||
** The Controlled Substances Act (CSA) schedule information displayed applies to substances regulated under federal law. There may be variations in CSA schedules between individual states.
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.