Gabapentin is used as a pain medication and mild sedation in cats. It is safe for patients with kidney disease. The typical dosage is 1/2 capsule twice daily for pain and 1 to 1 1/2 capsules to reduce anxiety/cause sleepiness 2 hours before needed. The capsules can be opened and the powder can be mixed into the cat’s canned food or it can be given in capsule orally. The most common side effect is sedation (obviously) and if that is not needed the medication can be given at a lower dosage or discontinued.