There is no single “best” medicine for low blood pressure. The right choice depends on what’s causing your blood pressure to drop, how severe your symptoms are, and whether lifestyle changes alone can manage the problem. Only two medications are FDA-approved specifically for orthostatic hypotension (the most common form that needs treatment): midodrine and droxidopa. Most people start with non-drug strategies first, and medication gets added when those aren’t enough.
When Low Blood Pressure Actually Needs Treatment
Low blood pressure on its own isn’t a problem. Plenty of people walk around with readings below 90/60 mmHg and feel perfectly fine. Treatment becomes necessary when low pressure causes symptoms: dizziness, lightheadedness, fainting, blurred vision, or fatigue, especially when you stand up. The clinical threshold for orthostatic hypotension is a drop of at least 20 mmHg in systolic pressure or 10 mmHg in diastolic pressure within three minutes of standing.
Before adding any new medication, the first step is figuring out whether something you’re already taking is dragging your blood pressure down. Beta-blockers and tricyclic antidepressants carry the highest risk, with roughly 6 to 8 times the odds of causing orthostatic drops compared to placebo. Alpha-blockers, antipsychotics, and certain diabetes medications (SGLT-2 inhibitors) roughly double the odds. If one of these is the culprit, adjusting the dose or switching to an alternative often solves the problem without adding another pill.
Lifestyle Measures Come First
Every guideline recommends trying non-drug approaches before prescribing medication. For many people, these strategies are enough on their own, and even those who do need medication will still use them alongside it.
Salt intake is the big one. While the general population is told to limit sodium, people with orthostatic hypotension are told to increase it. Recommendations from major cardiovascular societies range from about 2,400 to 4,800 mg of sodium per day, with some specialists pushing as high as 8,000 mg for severe cases. For context, the average American consumes around 3,400 mg daily, so most people with low blood pressure are advised to add 1,000 to 2,000 mg of sodium to their diet three times a day through salty foods or salt tablets. Drinking more water alongside the extra salt helps your body hold onto fluid and maintain blood volume.
Compression garments are another effective tool. Dysautonomia specialists typically recommend waist-high compression stockings rated at 20 to 40 mmHg of pressure. Waist-high is important because blood pools throughout the lower body, not just below the knees. Knee-high stockings are easier to wear but less effective. Other practical habits include standing up slowly, sleeping with the head of your bed slightly elevated, and avoiding prolonged standing or hot environments.
Midodrine: The Most Commonly Prescribed Option
Midodrine is one of only two FDA-approved drugs for orthostatic hypotension and is often the first medication doctors reach for when lifestyle changes fall short. It works by tightening blood vessels throughout the body, which raises blood pressure. The effect is fairly quick: standing systolic blood pressure typically rises by 15 to 30 mmHg within an hour of taking a dose, with the effect lasting two to three hours.
The standard dose is taken three times a day, spaced about four hours apart, timed around the hours you’re most active and upright. Importantly, midodrine should not be taken close to bedtime. The drug carries a black box warning about raising blood pressure while lying down, a condition called supine hypertension. Over time, elevated pressure while sleeping can strain the heart and kidneys. Timing the last dose no later than late afternoon is a common strategy to reduce this risk.
Droxidopa: For Nerve-Related Blood Pressure Drops
Droxidopa is the other FDA-approved option, but it has a narrower focus. It’s specifically approved for neurogenic orthostatic hypotension, the type caused by damage to the nerves that regulate blood pressure. This includes people with Parkinson’s disease, multiple system atrophy, pure autonomic failure, and certain types of neuropathy.
Your body converts droxidopa into norepinephrine, a chemical that tightens blood vessels and helps maintain blood pressure when you stand. Because it works through a different pathway than midodrine, droxidopa may be tried when midodrine isn’t effective or causes too many side effects, or when the underlying cause is clearly neurological.
Fludrocortisone: Retaining Salt and Water
Fludrocortisone is a synthetic steroid that mimics a hormone your body naturally produces to regulate salt and water balance. It causes the kidneys to hold onto more sodium and fluid, which increases blood volume and raises blood pressure. It’s used off-label for orthostatic hypotension, meaning it’s not specifically FDA-approved for this purpose, but it has decades of clinical use behind it.
Doses are small, typically 50 to 200 micrograms per day. Because it works by expanding blood volume rather than squeezing blood vessels, it tends to raise blood pressure more gradually and steadily than midodrine. The tradeoff is that it can cause swelling, low potassium levels, and, like midodrine, elevated blood pressure while lying down.
Pyridostigmine: A Gentler Alternative
Pyridostigmine takes a different approach. Rather than forcing blood pressure up all the time, it enhances the body’s natural reflex for raising pressure when you stand. It works by boosting nerve signaling in the pathway your body already uses to respond to positional changes. The practical advantage is that it may raise standing blood pressure without significantly increasing blood pressure when you’re lying down, which makes supine hypertension less of a concern.
The evidence on pyridostigmine is mixed but promising. Some studies have found it comparable to midodrine for reducing the blood pressure drop on standing, particularly in people with Parkinson’s disease. One study found pyridostigmine was actually superior to midodrine in that group. However, a head-to-head trial against fludrocortisone found it was less effective overall. Combining pyridostigmine with other medications that boost norepinephrine activity has shown a synergistic effect in patients with severe autonomic failure, meaning the two together work better than either alone.
How Doctors Choose Between These Options
The decision usually follows a pattern. If your symptoms are mainly about standing and daytime activity, midodrine is often tried first because it has the strongest evidence, a fast onset, and a short duration that gives you control over timing. If the cause is neurological, droxidopa becomes a strong contender. Fludrocortisone may be preferred when the main issue is low blood volume, or it may be used alongside midodrine for a combination effect. Pyridostigmine tends to be considered when supine hypertension is a major concern, since it’s gentler on lying-down blood pressure.
In practice, many people with moderate to severe orthostatic hypotension end up on a combination of medication plus lifestyle strategies. Someone might take midodrine during the day, wear compression garments, eat a high-salt diet, and elevate the head of their bed at night to manage supine hypertension. Treatment is rarely one pill that fixes everything. It’s a toolkit.
The severity of your symptoms also matters. If you’re occasionally lightheaded but never faint, lifestyle changes and perhaps a low dose of one medication may be plenty. If you’re fainting regularly or can barely stand without symptoms, a more aggressive combination approach is likely needed. Medications are adjusted over time based on how your blood pressure responds in both standing and lying positions.