Long COVID Atlas
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Note

Education, not medical advice. Do not start, stop, or change any medication or supplement without your own clinician, who knows your history and other medicines.

Treatment · Autonomic

Pyridostigmine

A drug that strengthens the body's own brake on heart rate. Pyridostigmine can ease the standing tachycardia of POTS without raising blood pressure, usually as an add-on when first-line options fall short.

Short version: pyridostigmine boosts the calming nerve signal to slow standing tachycardia. An add-on option; gut side effects are common and limit the dose.

Boosting the calming nerve signal

Pyridostigmine raises acetylcholine, strengthening the parasympathetic "brake" on heart rate. It can blunt the standing tachycardia of POTS without raising blood pressure.1

What standing up does Lying downheart rate about 72,blood spread evenly stand up Standingblood pools in the legs;to compensate the heartraces 30+ beats faster POTS = the racing heart on standing;orthostatic intolerance = dizzy, foggy, faint upright
Standing is a small cardiovascular stress test. Gravity pulls blood into the legs, and the body must tighten vessels and adjust heart rate to keep the brain supplied. When that reflex misfires, the heart compensates by racing (POTS) and the brain is briefly under-supplied, felt as dizziness, lightheadedness, and fog on standing.

What the evidence says

Single studies suggest a beneficial effect on standing heart rate and symptoms; reviews list it among reasonable options, often as an add-on. It connects mechanistically to the autonomic nerve injury seen in long COVID.2, 3

add-on option GI side effects common

Trade-offs

The main downside is gastrointestinal: cramps and loose stools are common and dose-limiting. It is often tried when first-line drugs are insufficient.

What we don't know

Honest about the edges of the evidence. These are open questions, not settled answers.

  • How reliably it helps post-COVID POTS.
  • Who tolerates the GI effects.
  • Best role in combination therapy.

References

Every reference is free to read in full.

  1. POTS and dysautonomia after COVID-19 (review of management).
  2. Oral medications for POTS, including PASC-associated POTS (systematic review).
  3. Treatment of POTS: non-pharmacological and pharmacological (systematic review).

Associated topics

SymptomOrthostatic intolerance (dizziness, lightheadedness)a treatment triedSymptomExercise intolerance / reduced VO2improvesMechanismDysautonomia / autonomic dysfunctionconnected, both directions