Hi, I was on it (10mg) for a total of 3 weeks and lost 5lb, I've lost 2 lb since that time but I had to suspend using Meridia until February. I have a Monarc Subfacial Hammock operation (you can look it up) Jan 4, and you can't be on Meridia for a period before/after the operation. My doctor did increase my thyroid medication so I'm slowly losing but not as fast as with Meridia.
You still have to watch what type of foods you eat and exercise but I always told myself that if I could just get below 200lb I would be excited and encouraged to continue. Well, I'm not there yet, although seeing fewer than 225lb was encouraging.
Keep me posted on how you're doing.
Hepeful