Cyp has a slightly longer half life than E but still really similar. No need to change what you are doing. I interchange every year based on the dela shortage and still pin once a week o no issue.Same thing here in Southern Ontario, Have been on
Delatestryl (Test-E) but they switched me to Cup. Because of the shorter Ester, if we're on test Cyp, should we be injecting twice a week to maintain more balanced levels?