I see nobody's replied so I will.
When I saw your post, I looked up Reductil online. When I saw it, my eyes perked up. I'm not obese and haven't tried diet drugs, but would like to drop about 2 kg before my upcoming birthday.
But after reading more about Reductil being discontinued and pulled from the market in many countries, that should raise red flags. Heck, it was banned in Mexico! So something was definitely wrong. I say that because you can buy almost any prescription drug off the shelf in Mexico.
Reductil might work but it's dangerous. You say you only took it 5 months so you might be ok, but the long-term effects are probably a different story. You might want to consider seeing a doctor here in Singapore and explain your situation and see what he/she recommends.
Otherwise, the best thing to do is probably drop weight the old-fashioned way: East less and exercise more. Keeping a food diary, either electronically or on a piece of paper, really helps. I need to start doing that today.