Among the rarely reported side effects of gabapentin are depersonalization, mania, agitation, paranoia, and increased or decreased libido. Only a few interactions between gabapentin and other drugs have been identified. This probably is not clinically significant. Alcohol may increase the severity of the side-effects of gabapentin. In the USA gabapentin is only approved for use in those over the age of 12.
Older people seem to handle gabapentin similarly to younger ones.
There is little experience using gabapentin for the treatment of psychiatric disorders in the elderly. There are no specific symptoms that have been described following the abrupt discontinuation of gabapentin, other than the seizures that sometimes follow the rapid discontinuation of any anticonvulsant. Only when necessary because of a serious side effect, should gabapentin be suddenly discontinued. Data on overdoses are scarce. Overdoses of up to 49,000 mg of gabapentin have been survived without sequelae.