What is the difference between gabapentin and gralise 1200mg other than cost?

Gaba and Gralise: Both are the same - Gabapentin. The gralise is a special formulation that slowly releases the gabapentin so that maximum uptake can be obtained. Gralise is a once a day (at night 1 hr after dinner). Gabapentinn is 3 times a day.

Different prep.: This was a question for which I needed to consult a pharmacology reference book, because I had not previously encountered Gralise. The latter is an extended release preparation of gabapentin: while the latter is usually prescribed on a BID to TID schedule, the Gralise is prescribed once a day, usually after the evening meal. Gabapentin would probably be just as effective, although less convenient.

Gralise - Gabapentin: Gabapentin is a generic name and Gralise is a brand name for the particular generic of gabapentin. In other words, they are the same drugs which possess the same therapeutic effects. The only difference should be the cost. However, because of possible differences in how the drugs are absorbed by your G.I. tract, I would recommend that you not change from one brand to another.