Hi anil, Thanks for using the HCM. I am happy to address your questions, cilacar (Cilnidipine), is the first dual calcium channel blocker , having a slow-onset and long lasting antihypertensive action. Cilacar is one of the latest calcium channel blocker and is gaining very good acceptance. Possible side effects are nausea, headaches, trouble breathing, swelling, low blood pressure, edema (water retention). Amlodipine (amlovas) less common side effects are indigestion, lack or loss of strength, muscle cramps, sleepiness or unusual drowsiness. These side effects may go away during treatment as your body adjusts to the medicine. Also, your clinician may be able to tell you about ways to prevent or reduce these side effects. Hope I have answered your query. If you have any further questions I will be happy to help. Thanks