I was sezure free on lamictal for 15 months, but with different side effects from refill to refill. Prior to April, I was on lamotrigine with the same maufacturer for most of the duration that I can recall. I refilled the lamotrigine 3-month prescription in February,2020 and had no seizures and no side effects. In April, 2020 I refilled the lamictal, which was made by the same manufacturer, took the same dosages at the same times as previous, but had severe side effects.

In April, I began having double vision, dizziness, and gait problems to the point where I could not walk without holding on to a wall. The side effects started 2 hours after taking the medication and lasted 2 hours.

Can the same manufacturer change their cemical combination of a generic drug from month to month?