I enjoy a bottle of prometh codeine from 2003. Is it still okay to pinch?

I cant stop coughing and I remember this worked wonders back afterwards, thanks for the reliefI enjoy a bottle of prometh codeine from 2003. Is it still okay to pinch?
yes!
should last a long time
Hey I am a doctor, most medication last for years even though adjectives pharmacies will put an expiration date 1 year from filling rx.
Most medication have an expiration date perceptible on the bottle. I don't know of any that stay effective after 4 years. I would recommend you hold your doctor write you a new presctiption.
As long as the bottle have been stored within a dark place, and not exposed to direct lantern, it's probably ok to use. Shake it up and look to see if it's cloudy looking. If it is cloudy, do not use it. Otherwise, it should be ok if it's been stored properly.