I am wanting to have gastric bypass surgery and I am on a lot of prescription drugs. the drugs are bupropion hcl 300mg, c-naltrexone 4.5mg, Cymbalta 90 mg, dilaudid 2mg prn, furosemide 20 mg, hydroxyzine hcl 50mg, lamotrigine 150 mg, lisinopril 10mg, melozicam 7.5 mg, ropinirole 2mg, tramadol 50 mg,vitamin d3 5000units,voltaren gel 1%, methotrexate 8 pills per week, folic acid 50 mg, in addition I have creams and gels to help relieve my psoriasis. how many of these drugs will have to be changed and I take so many pills at one time how will I continue to take them?