Cialis is the trade name and generic name of Tadalafil. Tadalafil 5mg once daily can be used to treat men with erectile dysfunction combined with benign prostatic hyperplasia with better results and mild side effects. Tadalafil 5mg once daily is part of the recommended daily dosing regimen for the treatment of erectile dysfunction combined with benign prostatic hyperplasia. It is a safe form of medication that has been proven in clinical trials to be effective and has mild side effects that are generally not serious. Common adverse effects of taking tadalafil include headache, dyspepsia, back pain, myalgia, nasopharyngitis, nasal congestion, and facial flushing. Patients with a known allergy to tadalafil and its prescribed ingredients should not take this product. Tadalafil is not used in women. Taking Tadalafil should be done under the supervision of a medical professional.