I'm with those who say check with a doctor before switching meds. The doc may say it's okay to use your wife's meds until you can pick up a new prescription for yourself. Or the doc may say don't do it. No matter what happens with your meds, the pain should decrease, but I don't want you to be in pain while you wait for that to happen.

Once upon a time my dad fell down our cellar stairs and was in pain. He called our family doc who said he could take my grandmother's pain meds until he (the doc) could call the pharmacy in the AM. There was no sense waking the pharmacist in the middle of the night to fill and deliver a prescription when something helpful was only six blocks away. My mom drove to my grandmother's house and brought home enough of the meds to last until the new prescription was ready. Those were the good old days!