On venlafaxine xr 150 for years and my dr. chgd to venlafaxine tablets due to cost. i have had to go on klonopin (clonazepam). now depressed/anxiety from switch?

Brand necessary: I do not believe in changing patients' effective treatment for insurance reasons and have called, written, faxed info to insurance companies numerous times to obtain authorization for off-formulary medications that have been effective for the patient for years. Please ask your physician if this is an option for you. Also, drug company discount cards, pharmacy programs,help. If it isn't broke......