Can you take a Tylenol 3 pill that is over a year old?

While Tylenol 3 (which contains acetaminophen, codeine, and caffeine) may not become harmful after its expiration date, its effectiveness can diminish over time. Medications are typically best used before their expiration date for optimal safety and efficacy. If you have an expired pill, it's advisable to consult a pharmacist or healthcare provider before taking it.