Are there side effects or interactions when those two drugs are taken concurrently?

DO NOT take both drugs. Both can cause high blood pressure if you're not careful. I would suggest using Meridia. I have used it for the last 5 months or so and have managed to lose 30 lbs. I could have lost more but I sometimes slack on the diet.
I have tried numerous weight loss drugs and I like this one the best. Fewest side effects and it's FDA regulated which means it's actually been tested unlike those weight loss drugs you buy over the counter. With any weight loss drug you should really talk to a doctor because they will be able to answer your drug interaction question.

Its not a good idea to take those drugs. They up your heart rate. So if you have any heart problems at all even if you don't know if you do or not it can kill you or cause permanent damage. My husband took Meridian and he would not recommend taking it.

I love it! I have taken it and I lose so much weight in a month. If I take it I weight in at 115,if I don't I weigh 127! Nothing ever has interacted with the diet pill,but I don't take any other prescription medicine. I do Pilates and Yoga too.