Hello! SO keeping hydrated is definitely one of the hardest things. I suffer from bulimia myself and I take medications everyday. Overall, the best way to ensure that you get the full dose of your medication is to stop purging all together. Which I am still working on..

However the best ways I have found to help keep hydrated without worrying about calories and such are to
1. Always carry a litre water bottle with you. Force yourself to stay hydrated and tell yourself to atleast finish one litre a day. This also helps with weight loss and keeps you more awake and alert! Really does help to get your body going.
2. Start off your morning drinking fresh lemon water, little boost to your immune system and the lemon helps to keep you hydrated, detoxifies your body and adds a little flavour..
3. Throughout the day, I'm not sure about you but for me, particularly after purging I am always cold, so a nice cup of tea always helps to soothe that. Always try and keep tea handy! even a few tea bags in your purse or in a little pouch. Green tea is great, calorie free, great for your body. I also find peppermint tea to be extremely soothing for my stomach (with meds) and with purging.

Also remember that drinking water, teas etc.. can be calorie free, and excellent for your body. So much water is lost through purging so just push yourself to rehydrate.

I hope this helps and that this message finds you well

xxx