We regularly get posts which say that someone has felt less well, even positively unwell, on their current or last lot of levothyroxine (or other medicine). Maybe they choose to switch to their next pack straightaway? Maybe they only realise when they start their next pack? All sorts of possibilities.
If, at some point, we want to check if it was a different batch, or if we want to make a Yellow Card report, it can be really helpful to know which batches we were taking!
For that reason, it can be a good idea to keep a record of batches (including expiry dates and makes/dosages). You could use a spreadsheet, a paper notebook, or even photograph each one (obviously making sure the batch details are clear and legible - most mobile phones are capable of perfectly adequate quality).
But I also suggest not throwing out the outer packaging but keeping it around for a few months. First, this acts as a record in itself. Second, it provides some proof you could send if you need to make a Yellow Card report. The packaging flattens down, or can be cut and opened out, so wouldn't take much space and or get confused with full packs.
You could write the date(s) when you start and finish each one on the packaging! (I have not been doing this, but suddenly realised that it is an obvious way of recording and needs nothing more than a writing implement! You don't have to open your computer/phone, find the notebook, or whatever. That can be done later.)
Obviously there are many options. All I'm really trying to do is suggest you think about it and do what suits you in your circumstances.
🟨 Making Yellow Card Reports 🟨