Cialis 20 mg contains tadalafil, a PDE5 inhibitor approved for the treatment of erectile dysfunction (ED). Tadalafil works by increasing blood flow to the penis during sexual stimulation. For as-needed treatment, 20 mg is the highest recommended Cialis dose and may not be suitable for everyone. Individual dosing should be determined with a licensed healthcare professional based on medical history, other medications, effectiveness and tolerability. For general ordering and shipping information, visit our FAQs For official U.S. prescribing and safety information about tadalafil, see the DailyMed tadalafil label.
Key Information
- Contains 20 mg tadalafil
- Used for the treatment of erectile dysfunction (ED)
- Works by helping increase blood flow during sexual stimulation
- For as-needed use, 20 mg is the highest recommended Cialis dose
- Effects may last up to 36 hours, although individual response varies.
- Sexual stimulation is required for an erection to occur
- Use only as directed by a licensed healthcare professional
How Cialis 20 mg Works
Tadalafil is a PDE5 inhibitor. It works by helping relax blood vessels and increase blood flow to the penis.
- Helps improve blood flow to the penis
- Supports the natural erectile response during sexual stimulation
- Does not increase sexual desire
- Does not cause an erection without sexual stimulation
For as-needed use, tadalafil can remain effective for up to 36 hours after a dose, although individual response varies. Follow the directions provided by a licensed healthcare professional.
Dosage & Administration
- Take Cialis only as directed by a licensed healthcare professional.
- For as-needed treatment of erectile dysfunction, the usual starting dose is 10mg before sexual activity. The dose may be increased to 20 mg or reduced to 5mg depending on effectiveness and tolerability.
- Do not take more than one dose in a 24-hour period.
- Cialis may be taken with or without food.
- The 20 mg strength is the highest recommended as-needed dose and may not be suitable for everyone.
Side Effects & Safety
Tadalafil can cause side effects. Commonly reported effects include headache, indigestion, back pain, muscle aches, nasal congestion and flushing. Side effects and their severity can vary between individuals.
- Do not take Cialis with nitrate medicines or “poppers.”
- Seek urgent medical attention for chest pain, severe dizziness or fainting, sudden vision or hearing changes, or an erection lasting longer than 4 hours.
- Stop using Cialis and seek medical attention for sudden vision loss or sudden hearing loss.
- People with cardiovascular conditions or those taking other medicines should speak with a licensed healthcare professional before use.
- Do not use Cialis with riociguat.
Product Details
Cialis 20 mg is labeled as containing tadalafil 20 mg per tablet. This listing is for a 2-tablet pack intended for the treatment of erectile dysfunction as directed by a licensed healthcare professional. Tadalafil is a PDE5 inhibitor and works by supporting increased blood flow during sexual stimulation.
The 20 mg strength is generally used as an as-needed dose rather than a routine once-daily dose. Tadalafil may be taken with or without food. Its effect may support erectile response for up to 36 hours after a dose, although individual response and duration can vary. Sexual stimulation is still required for an erection to occur. Do not take additional tablets because the expected response has not occurred immediately, and do not change the dose without professional advice.
Before use, review the supplied product information, including the strength, expiry date and any manufacturer instructions on the packaging.
Storage & Handling
Keep the tablets in their original packaging in a dry place away from excessive heat and moisture. Keep medicines out of reach of children and pets. Do not use tablets that appear damaged, discolored or are past the expiry date shown on the packaging. Retain the original packaging so the product strength, batch information and expiry date remain available for reference.






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