Which Works Faster? Side Effects Common side effects of Cialis include the following: Headache. Some people opt for a lower daily dose. The pill should be swallowed whole and not crushed, broken, or chewed. It works best when taken one hour before sex. An OTC drug will help patients get treatment more quickly.There are many ways to save on Cialis, which is available as both a brand-name and generic medication. Save with GoodRx. GoodRx can help you save over 97% off the average retail price of the generic version. Generic Cialisat certain pharmacies is less than $13 with a free GoodRx discount. The Lemonaid Pharmacy can deliver it to you for $2/pill, including FREE delivery. Our medical team can prescribe it in a 20mg, 60mg or mg dose. To choose the best ED medicine for you, check out: Of All the Erectile Dysfunction Drugs, Which One’s the Best? Get started Get Cialis and Tadalafil pill online.  · The approved dosages of Cialis for ED, BPH symptoms, or both, are between mg and 20 mg a day or as needed. Dosages higher than 20 mg a day haven’t been studied, and it’s not known what.