Old saxenda- been started, is it ok to use?

[Stickykidney]

So... Same old story... 2022 I lost 14kg with saxenda... Lovely side effects of nausea, headache, and the fear I might shit myself frequently... But with a heavy gym habit and calorie counting it worked. And I maintained. Until this summer. I bought a new pen with the idea of restarting in October but only used it a few times then stopped.
As it has been opened and started I knoww.i.shoild throw it away but it seems a waste as they are £50 a throw. Online the longest I can see that it would still be ok to use is 90 days
Does anyone have any experience of using an old pen or should I bite the bullet and restart with a new pen?

Excuse the typos!

Should be ok as long as the liquid is still clear, not past the expiry date printed on pen label and it has been kept in a fridge but it may have lost its potency in keeping you feeling full. I only did it once as a last resort where I wasn't able to use during a month's stay in hospital but it didn't make me sick.

To my mind you'd know in a few days and least you'd be easing yourself back on it.

Thanks, yes it's clear and in date thanks for replying. Seems a shame to waste it...