It will not stimulate any positive effect, and could cause unwanted side effects. It’s recommended to take the tablet at the same time each day. This dose can be adjusted later if recommended by your pharmacist or GP. It is suggested that you should look to take Cialis minutes before you hope to be sexual active however reports have shown that results have been seen as early as 20 minutes after the taking of the tablet. It should be noted that when taking Cialis after a high-fat meal or one of excessive amounts of food, the effect of the treatment can be slowed down but generally within the one hour time frame allows for the medication to take effect. Can women take Cialis?Cialis (branded Tadalafil) Cialis is a reliable, branded ED treatment that lasts up to 36hrs. Can be taken with food. Works in 30mins, lasts up to 36hrs. Works for 80% of men. 10mg 20mg. 4 tablets. Out of stock. 8 tablets. 10mg 20mg Subscription (save 15%) One time treatment 4 tablets Out of stock Out of stock 8 tablets Out of stock Out of stock 16 tablets Out of stock Out of stock One-time or subscription How to take Tadalafil Take one tablet at least 30 minutes before sex. Effects can last for up to 36 hours. Never take more than one tablet within 36 hours. Cialis is a prescription medication that is manufactured by Lilly ICOS LLC and a branded name given to tadalafil, a drug that has been clinically proven to be effective in the treatment of erectile dysfunction symptoms that can cause men to have an inability to be able to either obtain or maintain an erection suitable for sexual penetration.. An oral PDE5 inhibitor, .