that varies. there are no set rules. some of our electronic prescriptions have expiration dates. some pharmacists will not fill an older prescription if it is not medically-appropriate. since i don't know what you are filling and how old the prescription is you will just have to try and fill it (if it is appropriate that you do so at this time) at the pharmacy.
how long is presciption good for? . how long can i wait before a prescription will not be filled? it's not a controlled substance or antibiotic.