How to take Cialis? Refills: See if you can set up automatic refills or order as needed. Cialis works by increasing blood flow to the penis so you can get and keep an erection. The diagnosis of erectile dysfunction may require an in-person visit with your doctor. Blood pressure may drop to life-threatening levels if Cialis Tadalafil is taken with any nitrate-containing medication e.Prescription needed: yes Dosage: 5 mg Usage: take as needed or daily at a low dosage GET STARTED WITH HIMS MNT ‘s review At Hims, Cialis is available as: Daily tadalafil: or 5 mg daily. Buying prescription drugs online is easy with Canada Pharmacy. All you need to do is search for the brand or generic prescription drug using the boxes above and select your medication and checkout. Save up to 80% compared local US pharmacies and also take advantage of our price match guarantee.  · Generic Cialis is called Tadalafil and you could save up to 90% on the price of your medication by buying brand or generic Cialis online through Canadian Pharmacy Meds. Buying Tadalafil may offer even better savings and comes in the same strengths of 20mg, 10mg, 5mg or mg.