Some might experience headaches, back pain, or flushed skin. Ask your healthcare professional how you should dispose of any medicine you do not use. You’ll soon start receiving the latest Mayo Clinic health information you requested in your inbox. For many, Cialis has emerged as a trusted companion, weaving stories of physical and emotional wellness. For treatment of erectile dysfunction daily use : Adults—2. This allows an increase of blood flow into the penis.The recommended starting dose of Methylphenidate HCl Extended-Release Capsules CD is 20 mg once daily. Dosage may be adjusted in weekly mg . CIALIS for Use as Needed for Erectile Dysfunction. The recommended starting dose of CIALIS for use as needed in most patients is 10 mg, taken prior to . • daily dosage: mg to 5 mg once daily • as needed dosage: 20 mg once daily at least 30 minutes before sexual activity, with a maximum of one dose per day † • .