Most people here will recommend avoiding diet pills. Nutrition and exercise are the best ways to keep the weight off long term. However, if you are really keen to use pills talk to your GP. From your introduction elsewhere on the forum it appears that you are only a few kilos off goal weight. I don't think many health professionals would recommend using weight loss drugs at this stage of your weight loss journey, but only a medical professional will be able to tell you whether it's safe for you to take pills, and if so what pills you should be taking.
It's likely you've hit a weight loss plateau. SparkPeople have an excellent series of articles about how you can tackle plateaus. I highly recommend reading them! (LINK
* Check you're not accidentally eating too much. More calories may have crept into your diet slowly over time. Keep a food diary. Calorie King
is a great resource where you can sign up for a free profile, find out how many calories you should be consuming each day and compare that to how many you are really consuming each day.
* Check you're not accidentally eating too little. Dropping below 1200 calories per day can put your body into starvation mode where it desperately tries to cling on to fat to stop you from starving to death. Check what you're eating and that you're not overestimating your calorie intake.
* If you've been doing the same exercise for months consider changing to something new. The body is very adaptable and learns how to do exercise as efficiently as possible so you burn fewer calories over time. Changing to a new exercise can shock your body into starting to lose weight again.
* Shake up your diet. If you've been eating the same thing constantly consider changing for a bit. Maybe swap steamed veggies for salads. Try low carb for a week. Cut out bread. Just do something to take your body out of its comfort zone.
Good luck, FitAndHealthy2010!
I love how positive your username is. It's definitely sending your subconscious the right message. Good on you for thinking positively!