You can read more information on the different Tadalafil doses available here. You should also call your insurance company to see if they cover erectile dysfunction medications. You can take tadalafil on its own or with a meal without affecting the amount of time it takes for the medication to start working. Refills: See if you can set up automatic refills or order as needed. If your prescription is for Cialis Daily, it can help to take it at the same time each day to maintain a steady level of tadalafil in your body. The expiration date for any given drug will be how long the manufacturer is willing to guarantee that the product meets the labelled standards.CIALIS for Use as Needed. Creatinine clearance 30 to 50 mL/min: A starting dose of 5 mg not more than once per day is recommended, and the maximum dose is 10 mg not more than once in every 48 hours. Creatinine clearance less than 30 mL/min or on hemodialysis: The maximum dose is 5 mg not more than once in every 72 hours [see . AdBrowse thousands of brands and find deals on male ed meds at Amazon®. Shop Now! Discover new arrivals & latest discounts in male ed meds from your favorite brands. Best prices for generic cialis on the Internet! The safest way is to ask your physician to try an alternate prescription. Detailed dosage guidelines and administration information for Cialis (tadalafil). Includes dose adjustments, warnings and .