I Have Been On Klonopin And Then Clonazepam For Almost

I have been on Klonopin and then Clonazepam for almost 20 years. In the last two months my insurance company switched to mail order and I am getting a generic by TEVA. I have started having alot of anxiety since then and my psychiatrist has upped my Clonazepam but it isn't working. I am also on Paxil and Abilify. My question is Is there a difference between Brand name and generic? Thank you.