They have the same benefits and risks as their brand-name counterparts. Cialis can also interact with other medications, including nitrates and blood pressure medications. Cialis was also investigated in combination with finasteride, another BPH medication, in another trial. However, safety should always be the top priority. They can provide guidance on the right dosage and potential drug interactions.The most commonly reported side effects in patients treated with Cialis during the testing of the product were: headache. indigestion. back pain. muscle pain. flushing. stuffy nose. Patients who. Fastest Delivery: Blink Health: Sesame Sign Up Now Key Specs Cost: Consultation prices vary based on the prescriber; $5 generic prescriptions Medical . Cialis comes in several strengths: milligrams (mg), 5mg, 10 mg, and 20 mg. The Cialis cost per pill and daily cost depend on several factors, such as: the strength prescribed by your doctor.