What about cycles? If this occurs, stop using Cialis right away and seek medical advice. Another well known drug in this category is Viagra. So as you see, Cialis is so much more than just a sexual performance drug!! Does Cialis lower blood pressure?The tadalafil dosage for erectile dysfunction will vary from person to person. Make sure you consult with a doctor before taking tadalafil, and do not change the dosage that your doctor recommends. Tadalafil is provided in different dosages, including: milligrams (for daily use) 5 milligrams (for daily use). 1. DueChain00 • 3 yr. ago. Conclusion: Tadalafil at doses of 5, 10, or 20mg taken as needed up to once daily for 18 to 24 months was safe and well tolerated. These findings . I’m seeking personal insights on the long-term, daily use of low-dose tadalafil (mg or 5mg) for erectile dysfunction (ED). I have completed a 6-month regimen of 5mg tadalafil .