Hello and welcome to MedHelp's forums. Do you have a pharmacy you go to regularly? The pharmacist there would be excellent to ask this question to or the doctor who prescribes the medication for you. In general, 10 mg is the starting dose of cilnidipine and 5 mg is the starting dose of amlodipine. So, those are the initial starting doses and why they'd be said to be 'comparable'. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4397623/
Let us know how it is going.