reta question

what are the consequences of degraded reta? me and my friend are planning on getting 20mg which will last us 5 weeks at the dose we want. i’ve heard conflicting opinions on when it degrades. if hypothetically it did degrade after a month, what are the effects? is it just less effective or are there more serious potential risks? also i have a mini fridge that ranges from 2-10degrees depending on the temp externally. my room is pretty cool usually so should be on the lower end but hypothetically if it was stored at 10 degrees, what are the risks? might be overthinking but its my first time and advice would be appreciated thanks guys