Owing to user error (me!) I missed my Royal Mail delivery with my latest 2.5mg Mounjaro pen and it’s being taken to the post office nearest my mum, which was an old specification I’d made and forgotten to change. Earliest I can pick it up is Monday. Can I still use it or will it have to be thrown away? I would be planning to use it within 3 weeks and I don’t think it will be 30 degrees c.