"An insurer can remove a drug from its formulary, increase co-payments or impose new restrictions "only if enrollees currently taking the affected drug are exempt from the formulary change for the remainder of the plan year."" http://www.nytimes.com/2006/04/27/washington/27medicare.html?_r=1&hp&ex=1146110400&en=6a7f934d25cbe5f8&ei=5094&partner=homepage&oref=slogin "People Who experience mood swings, fear, voices and visions"
