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PubMed This is a summary of 17 peer-reviewed journal articles Updated

Managing High Blood Pressure When Lying Down

At a Glance

In pure autonomic failure, high blood pressure while lying down can worsen morning dizziness by causing overnight salt and water loss. Elevating the head of the bed, avoiding daytime flat lying, adjusting medication timing, and using prescribed short-acting bedtime medicine may help.

Managing Pure Autonomic Failure (PAF) requires a delicate balancing act. While you must treat the low blood pressure that occurs when you stand (orthostatic hypotension), you must also manage the high blood pressure that occurs when you lie down—a condition called neurogenic supine hypertension [1][2].

The “Ups and Downs” of Blood Pressure

In a healthy body, the “baroreflex” system acts like a thermostat, keeping your blood pressure stable whether you are standing or lying down [3]. In PAF, this buffering system is impaired. Neurogenic supine hypertension reflects this loss of baroreflex control, along with residual sympathetic tone, blood-volume mechanisms, and the effects of daytime pressor drugs [3][1].

Neurogenic supine hypertension is defined as a blood pressure of at least 140 mmHg systolic OR at least 90 mmHg diastolic after resting on your back for at least 5 minutes [2]. While moderate elevations might seem less urgent than feeling faint, severe readings carry risks of potential long-term damage to the heart, kidneys, and brain [4][5].

The Nighttime Cycle

High blood pressure at night doesn’t just happen in a vacuum; it directly worsens your symptoms the next morning through a process called pressure natriuresis [6][7].

  1. High Pressure: When you lie flat at night, your blood pressure climbs.
  2. Fluid Loss: Your kidneys sense this high pressure and try to lower it by flushing salt and water out of your body [6].
  3. Morning “Crash”: By morning, you have lost a significant amount of fluid (often seen as nocturia, or excessive nighttime urination), leaving you more dehydrated and more likely to feel faint when you stand up [6][8].

Managing Supine Hypertension: Non-Drug Strategies

Before using medications to lower your nighttime blood pressure, doctors recommend several lifestyle adjustments [9][10]:

  • Elevate the Head of the Bed: This is one of the most effective tools for PAF [10]. By safely elevating the entire head of the bed (such as using secure 4- to 6-inch blocks under the bed frame, per your care team’s recommendation) you use gravity to keep blood in your lower body. Avoid relying on loose pillows, which bend your neck but don’t help your core [7][11]. This helps lower your blood pressure while you sleep and reduces nighttime fluid loss [8].
  • Avoid Lying Flat During the Day: If you need to rest, do so in a recliner or a chair rather than lying flat on a bed or sofa [9][12].
  • The Bedtime Snack: Some limited evidence suggests that an optional small snack before bed may help lower nighttime blood pressure by pulling some blood flow toward the digestive system [9][10].
  • Review Medication Timing: Ensure that medications designed to raise your blood pressure (like midodrine) are taken early enough in the day—usually at least 4 hours before you plan to lie down [13][12].

When Lifestyle Changes Aren’t Enough

Moderate readings are not automatically treated. However, if your systolic blood pressure consistently stays in the severe range (often 160–180 mmHg) while lying down, your doctor may consider a short-acting blood pressure medication taken only at bedtime [9][14]. The goal is to lower your pressure through the night without it still being active when you stand up in the morning [15].

Commonly prescribed short-acting options include losartan, captopril, clonidine, or nitrate patches [14][16].

A Critical Caution: Any medication that lowers your blood pressure at night increases your risk of “carryover hypotension” if you have to get up in the middle of the night (for example, to use the bathroom), leading to dangerous falls [15][17].

  • Never take extra medication or change your pressor doses without a prescribed plan.
  • If you must get up at night, move slowly, sit on the edge of the bed for a full minute before standing, and ensure your path to the bathroom is clear and well-lit [17].



    For a list of emergency symptoms related to high blood pressure, see the Symptoms and Warning Signs page.

Common questions in this guide

What does neurogenic supine hypertension mean in pure autonomic failure?
In pure autonomic failure, neurogenic supine hypertension means a blood pressure of at least 140 systolic or 90 diastolic after resting on your back for at least five minutes. It reflects impaired automatic blood pressure control and may occur alongside low blood pressure when standing.
Why can high blood pressure at night make me dizzy the next morning?
When nighttime blood pressure rises, the kidneys may remove extra salt and water from the body. Frequent nighttime urination can leave you less hydrated, making dizziness or fainting more likely when you stand in the morning.
What can I do without medication to lower blood pressure while lying down?
Ask your care team whether to elevate the entire head of your bed using a secure frame, blocks, or another recommended method rather than loose pillows. Avoid lying flat during the day, and discuss whether a small bedtime snack is appropriate because evidence for this approach is limited.
When might a bedtime blood pressure medicine be used for pure autonomic failure?
If blood pressure remains consistently severe while lying down, often around 160 to 180 systolic, a clinician may consider a short-acting medicine taken at bedtime. Options mentioned for this problem include losartan, captopril, clonidine, and nitrate patches, but the safest choice depends on your other medicines, nighttime symptoms, and risk of falling.
How can I safely get up at night if I take treatment for supine hypertension?
Nighttime blood pressure medicine can sometimes remain active when you stand, causing a dangerous drop in blood pressure. Sit on the edge of the bed for a full minute, stand slowly, use a clear well-lit path, and never change or add medication without a prescribed plan.

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Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Based on my home monitoring, what is my average blood pressure after lying down for 10 minutes, and does it reach the 'severe' range of 160–180 mmHg?
  2. 2.How much should I elevate the head of my bed, and what is the best way to do that (blocks, wedges, or an adjustable frame)?
  3. 3.If we decide to use a short-acting blood pressure medication at bedtime, which one is safest for me if I need to get up to use the bathroom in the middle of the night?
  4. 4.Are my current 'pressor' medications for standing (like midodrine) being taken too late in the afternoon, and could that be contributing to my high blood pressure at night?
  5. 5.What symptoms should I look for that indicate my high blood pressure at night might be causing damage to my heart or kidneys?

References

References (17)
  1. 1

    Management of Supine Hypertension Complicating Neurogenic Orthostatic Hypotension.

    Baker J, Kimpinski K

    CNS drugs 2017; (31(8)):653-663 doi:10.1007/s40263-017-0453-9.

    PMID: 28702747
  2. 2

    Consensus statement on the definition of neurogenic supine hypertension in cardiovascular autonomic failure by the American Autonomic Society (AAS) and the European Federation of Autonomic Societies (EFAS) : Endorsed by the European Academy of Neurology (EAN) and the European Society of Hypertension (ESH).

    Fanciulli A, Jordan J, Biaggioni I, et al.

    Clinical autonomic research : official journal of the Clinical Autonomic Research Society 2018; (28(4)):355-362 doi:10.1007/s10286-018-0529-8.

    PMID: 29766366
  3. 3

    Pure Autonomic Failure.

    Thaisetthawatkul P

    Current neurology and neuroscience reports 2016; (16(8)):74 doi:10.1007/s11910-016-0673-2.

    PMID: 27338613
  4. 4

    The impact of supine hypertension on target organ damage and survival in patients with synucleinopathies and neurogenic orthostatic hypotension.

    Palma JA, Redel-Traub G, Porciuncula A, et al.

    Parkinsonism & related disorders 2020; (75()):97-104 doi:10.1016/j.parkreldis.2020.04.011.

    PMID: 32516630
  5. 5

    Cardiac Organ Damage and Arterial Stiffness in Autonomic Failure: Comparison With Essential Hypertension.

    Milazzo V, Maule S, Di Stefano C, et al.

    Hypertension (Dallas, Tex. : 1979) 2015; (66(6)):1168-75 doi:10.1161/HYPERTENSIONAHA.115.05913.

    PMID: 26459422
  6. 6

    What do we really know about supine hypertension in patients with orthostatic hypotension.

    Jordan J, Tank J, Heusser K, et al.

    Current opinion in cardiology 2019; (34(4)):384-389 doi:10.1097/HCO.0000000000000633.

    PMID: 31021876
  7. 7

    Blood pressure regulation in autonomic failure by dietary sodium, blood volume and posture.

    Biaggioni I

    Autonomic neuroscience : basic & clinical 2021; (236()):102891 doi:10.1016/j.autneu.2021.102891.

    PMID: 34634681
  8. 8

    Continuous Positive Airway Pressure for the Treatment of Supine Hypertension and Orthostatic Hypotension in Autonomic Failure.

    Okamoto LE, Celedonio JE, Smith EC, et al.

    Hypertension (Dallas, Tex. : 1979) 2023; (80(3)):650-658 doi:10.1161/HYPERTENSIONAHA.122.20081.

    PMID: 36601916
  9. 9

    Supine hypertension: A state of the art.

    Mantovani G, Marozzi I, Rafanelli M, et al.

    Autonomic neuroscience : basic & clinical 2022; (241()):102988 doi:10.1016/j.autneu.2022.102988.

    PMID: 35613491
  10. 10

    Management of Orthostatic Hypotension.

    Palma JA, Kaufmann H

    Continuum (Minneapolis, Minn.) 2020; (26(1)):154-177 doi:10.1212/CON.0000000000000816.

    PMID: 31996627
  11. 11

    Head-Up Tilt Sleeping to Treat Orthostatic Intolerance in a Patient with Advanced Parkinson's Disease: A Case Report.

    van der Stam AH, Shmuely S, de Vries NM, et al.

    Case reports in neurology 2024; (16(1)):256-261 doi:10.1159/000541424.

    PMID: 39474293
  12. 12

    Management Strategies for Comorbid Supine Hypertension in Patients with Neurogenic Orthostatic Hypotension.

    Isaacson SH, Dashtipour K, Mehdirad AA, Peltier AC

    Current neurology and neuroscience reports 2021; (21(4)):18 doi:10.1007/s11910-021-01104-3.

    PMID: 33687577
  13. 13

    Durability of the Clinical Benefit of Droxidopa for Neurogenic Orthostatic Hypotension During 12 Weeks of Open-Label Treatment.

    Hauser RA, Favit A, Hewitt LA, et al.

    Neurology and therapy 2022; (11(1)):459-469 doi:10.1007/s40120-021-00317-5.

    PMID: 35107750
  14. 14

    Dysautonomia: A Forgotten Condition - Part 1.

    Rocha EA, Mehta N, Távora-Mehta MZP, et al.

    Arquivos brasileiros de cardiologia 2021; (116(4)):814-835 doi:10.36660/abc.20200420.

    PMID: 33886735
  15. 15

    Management of supine hypertension in patients with neurogenic orthostatic hypotension: scientific statement of the American Autonomic Society, European Federation of Autonomic Societies, and the European Society of Hypertension.

    Jordan J, Fanciulli A, Tank J, et al.

    Journal of hypertension 2019; (37(8)):1541-1546 doi:10.1097/HJH.0000000000002078.

    PMID: 30882602
  16. 16

    Multimodal Management of Supine Hypertension With Orthostatic Hypotension in an Elderly Male Patient With Parkinson's Disease.

    Dayal M, Shah MS, Radfar N, et al.

    Cureus 2025; (17(4)):e82394 doi:10.7759/cureus.82394.

    PMID: 40385848
  17. 17

    Neurogenic orthostatic hypotension and supine hypertension in Parkinson's disease and related synucleinopathies: prioritisation of treatment targets.

    Espay AJ, LeWitt PA, Hauser RA, et al.

    The Lancet. Neurology 2016; (15(9)):954-966 doi:10.1016/S1474-4422(16)30079-5.

    PMID: 27478953

This page explains ways to manage high blood pressure when lying down with pure autonomic failure for informational purposes only and does not constitute medical advice. Your clinician should determine medication timing and any bedtime treatment based on your blood pressure pattern and fall risk.