Is it safe to take ritalin (methylphenidate) and phentermine together- one for add and the other for weight loss?

No! It is not safe..: Neither alone nor together those products are safe for adults. The risk of heart attack, sudden death, and stroke rises with one medication, and multiplies with two or more. Particularly, without a previous cardiac work up, and without an appropriate follow up by an specialist in treatment of obesity, the psychiatrist should exercise extreme caution when using stimulants for adhd in adults.

Phentermine is Bad: Phentermine is not safe to take under any circumstances. It is dangerous for you heart. It is dangerous for your brain. It will trick you into an obsessive or compulsive habit to take it at all costs. But, it doesn't work. It does not lead to any real or lasting weight loss. This is where your brain get's lied to. Please do not put your heart or life at risk for this fake pill.

Ritalin (methylphenidate): No it is not, do to additive effect.