Yes, the active ingredient is the same, but sometimes with generics they are not absorbed into the body in the same way. When a drug goes generic there is a period of time where the effectiveness of the generic is in question because it is new even though the active ingredient is tested and effective. All very weird and usually if one works for you then the other will too, but there is always that question.

This sort of stuff can be very interesting. For example the name brand Effexor and its generic Venlafaxine. The name brand is typically better tolerated by the body because of the rate in which it releases the drug into your body and therefore easier to use when trying to get to a therapeutic dosage at a faster rate. In my case I was able to increase my dosage of Effexor to a therapeutic dosage in under half the time it would have taken with the Venlafaxine even though the key ingredient is the same. Once we did this and I had successfully acclimated my body to the drug I was then able to go onto the generic with no difficulty.