I have meclizine that was filled on 12/07/2021 for vertigo. the expiration date is off of the bottle so i cant not see it. will it be effective if i take it?

Over-the-counter medication’s that are 3 to 4 years old are generally effective as long as they have not been exposed to moisture, high or low temperatures. Generally, if they’ve been kept at room temperature, they should be fine , or slightly less effective , but not significant .

Likely that your meclizine remains as effective today as when you purchased it. Typically, solid medications which are not exposed to adverse conditions, are stable for a long time past the expiration date.