Treatment · Autonomic
Midodrine
Where a racing heart is not the whole story, the problem is often vessels that will not tighten on standing. Midodrine constricts those vessels, and it is one of the better-supported POTS medications.
Short version: midodrine tightens blood vessels to counter pooling on standing. A mainstay POTS drug, dosed through the active day and avoided before lying down.
Tightening the vessels
Midodrine constricts blood vessels, countering the pooling that under-supplies the brain on standing. It targets the vessel-tone side of orthostatic intolerance rather than the heart rate.1
What the evidence says
Across POTS trials, midodrine has one of the higher symptomatic-improvement rates, and it is widely used as a mainstay. Evidence specific to post-COVID POTS is thinner but consistent.2, 3
mainstay option
Practicalities
It is short-acting, so it is dosed through the active day and avoided before lying down (to prevent supine high blood pressure). It is often combined with fluids, salt, and compression.
What we don't know
Honest about the edges of the evidence. These are open questions, not settled answers.
- How well it works specifically in post-COVID POTS.
- Best combinations with other agents.
- Managing the supine-hypertension caution.
References
Every reference is free to read in full.