You can also look for sugar free root beer. Not all if them but a good number have whopping amounts of sodium. I drink that and take salt stick capsules (2 3x a day, without caffeine) and it helps a lot when I'm losing weight

My goodness I’m having this exact same issue. I’ve noticed that eating a bit less but more frequently helps (like a cracker in one hour and then just a slice of salty meat the next)

20 pounds in 6 weeks seems like too drastic of a drop rate. I am a smaller person 125 lbs before pots started. 145 after a year and a half of pots and betablocker (metoprolol, 150mg) and cancer surgery. Just for comparison, that was higher than my max pregnancy weight. Anyway, my pots seems to be mainly fluid gain in the gut area during the day. So tried losing weight to increase midsection compression (i breakout or sciatica from waist high compression garments). I have lost 15 pounds in 5 months. To get any loss, i had to go all the way down to 1200 calories, nothing but essentials. I had some issues, but unlike you, nothing too bad. The benefit came after i leveled off and that 1200 was no longer dropping weight. I was able to increase my activity enough, i could up calories to 1400. Thats been a year now. Doing well. Recentky added weight back (with no change in eating), but i had kidney stones and that must had influenced metabolism. Bottom line, the weight loss, even as moderate as it was. Did really help. Maybe 25%. I'll take it.