For what it is worth, I had the same question on some strips that I had never used, but wrapped in Saran Wrap, put in a basement refrigerator, and "lost" for 3 years. I called the phone number on the package and was told they would still be perfectly safe and effective. I used them with no ill effects. -----Original Message----- From: Bill Mares <[log in to unmask]> To: [log in to unmask] <[log in to unmask]> Date: Sunday, February 15, 1998 9:36 PM Subject: apistan strip life >Here's a dumb question the Apistan package doesn't answer: how long are the strips viable? I had some left over from last summer and kept them wrapped up in a cool basement. Can I use them this year? Thanks.