II'm looking for a fast prescription drug for weight loss. My doctor ordered me belviq but my insurance won't cover it. I need to loose weight quickly because I'm endangering my already feeble body due to weight gain. I can't get much exercise due to four neck surgeries, four knee surgeries. I'm awaiting another total knee replacement, but can't get until my weight is down. My hips, knees and back are suffering even more due to lack of movement due to being overweight, not to mention my depression is at the very worst ever. Help me please, or I'm just done!!!!