I've been wanting to get it over with so I've been mixing one double dose instead of two single ones. Maybe that's what's been making it so unbearable. It took me well over an hour to force today's second dose down.
Here's the TMI part: it was much quicker on the way up again.
I'm going to break it up into single doses from now on. And dump in crazy amounts of my favorite pink lemonade mix, from Whittard. It can't make it any worse.