Cialis (Tadalafil): Uses, Dosage, Side Effects & FAQs
Cialis, the brand name for Tadalafil, is a prescription medication used to treat erectile dysfunction (ED) and benign prostatic hyperplasia (BPH) in men. Known for its long-lasting effect—up to 36 hours—Cialis is one of the most popular and trusted medications for improving male sexual performance.
What is Cialis (Tadalafil)?
Cialis is a PDE5 inhibitor, similar to Viagra (Sildenafil), but with a longer duration of action. It works by increasing blood flow to the penis during sexual stimulation, making it easier to get and maintain an erection.
Tadalafil is also available under the brand name Adcirca for treating pulmonary arterial hypertension (PAH).
How Cialis Works
Tadalafil relaxes the smooth muscles and increases blood flow in certain areas of the body. For ED, it helps by allowing better blood circulation to the penis. It doesn’t cause an erection on its own—sexual stimulation is still required.
Approved Medical Uses
- Erectile Dysfunction (ED)
- Benign Prostatic Hyperplasia (BPH)
- ED + BPH combination treatment
- Pulmonary Arterial Hypertension (Adcirca)
Dosage and Administration
Cialis comes in 2.5 mg, 5 mg, 10 mg, and 20 mg tablet forms.
For Erectile Dysfunction:
- As needed: 10 mg before sexual activity (can range from 5–20 mg)
- Daily use: 2.5–5 mg once daily at the same time
For BPH:
- 5 mg once daily
Note: Always take Cialis as directed by a healthcare provider.
How Long Does Cialis Last?
Cialis is often called the “weekend pill” because it can remain effective for up to 36 hours. This gives men more flexibility and spontaneity compared to other ED medications.
Common Side Effects
- Headache
- Back pain
- Muscle aches
- Flushing
- Nasal congestion
- Indigestion
Side effects are usually mild and temporary. Back and muscle pain may appear 12 to 24 hours after taking the dose.
Serious Side Effects (Seek Medical Help)
- Sudden vision or hearing loss
- Chest pain
- Painful or prolonged erection (priapism)
- Difficulty breathing
Warnings and Precautions
- Nitrate Medications: Do not take Cialis with nitrates (e.g., nitroglycerin)
- Heart Conditions: Consult a doctor before use
- Alcohol Use: Can increase the risk of side effects like dizziness or low blood pressure
- Other ED Medications: Do not mix with other PDE5 inhibitors
Cialis vs Viagra
| Feature | Cialis (Tadalafil) | Viagra (Sildenafil) |
|---|---|---|
| Onset of Action | 30–60 minutes | 30–60 minutes |
| Duration | Up to 36 hours | 4–6 hours |
| Daily Option | Yes | No |
| Food Restrictions | None | High-fat meals delay effect |
Frequently Asked Questions
Q1: Can I take Cialis daily?
Yes, a daily low-dose version (2.5 mg or 5 mg) is approved.
Q2: Is Cialis better than Viagra?
It depends on your needs. Cialis lasts longer and allows more flexibility.
Q3: Can I use Cialis for BPH?
Yes, it is FDA-approved to treat benign prostatic hyperplasia.
Q4: Can women use Cialis?
Cialis is not approved for use in women.
Final Thoughts
Cialis is a highly effective and well-tolerated treatment for erectile dysfunction and BPH. With its long-lasting action, it offers more convenience and confidence to men. As with all medications, consult a doctor to see if Cialis is right for you.
✅ Sources / Scientific References:
- Mayo Clinic – “Tadalafil (Oral Route)”
https://www.mayoclinic.org/drugs-supplements/tadalafil-oral-route - FDA – “Cialis (Tadalafil) Prescribing Information”
https://www.accessdata.fda.gov - Cleveland Clinic – “Cialis for Erectile Dysfunction”
https://my.clevelandclinic.org - MedlinePlus – “Tadalafil Oral”
https://medlineplus.gov/druginfo/meds/a604008.html - PubMed – “Tadalafil for the treatment of ED and BPH”
https://pubmed.ncbi.nlm.nih.gov/16291277/