Rapamycin (Rapamune) Solution Expiry

Hi, I've got hold of Rapamune solution (60ml). It says to discard the container 30 days after opening the container. My wife and I are doing the 5mg/week anti aging treatment, which means we'll hit the 30 days limit before using up the whole container. I'm unable to find any information on what the consequence of exceeding the 30 days limit is. Other than the efficacy, does anyone know of dangerous effects of exceeding the 30 days limit?