Cialis. Generic Name: tadalafil; Brand Name: Cialis. Last reviewed on RxList: 3/5/ The recommended starting dose of CIALIS for once daily use is mg, .. Coadministration of tadalafil (40 mg once per day) for 10 days did not have a . Adcirca, Alyq, or generic equivalent only. 40 mg PO once daily; dividing dose for more frequent dosing is not recommended. Patients also taking ritonavir: 20 mg. Official answer: The maximum recommended dose of Cialis is 20mg daily. Increasing the dose to 40mg might just increase the intensity of.