Is It Safe To Take Carb Levo Entacap Prescribed For Parkinson S?

I have Parkinsons and I take Carb/entacap TAB LEVO 150 NDC 0000.In talking to various people and my doctor I believe this is a combination of two drugs.Are thee 2 drugs sold separately? The reason I m asking is that my coverage for my prescriptions has been drastically reduced.I m retired now and worked for GE Co. for 35 years and recently they reduced their coverage to $1000 per year. This doesn t go very far when I pay $679 for a 90 day supply of Carb/entacap TAB LEVO 150.I am told it might be cheaper to buy the 2 drugs separately.