Recent search for POTS info in the last week or so suggests 3-5g daily.

I take:
Each serving (2 capsules) contains: 500 mg sodium (22 mmol sodium, 1270 mg sodium chloride), 100 mg potassium.
I take 8 capsules daily (1 cap every 2 hours that I need to stay awake & upright).

So 4 caps is 1g, 8 is 2g and I can consider taking up to (4cap*5g=20caps) 20 caps, so right now I’m taking one every two hours, and it would be nice to find a doctor that can help me figure out if I should be taking them hourly instead.