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Some causes of orthostatic hypotension include neurodegenerative disorders, low blood volume (e.g. caused by dehydration, bleeding, or the use of diuretics), drugs that cause vasodilation, other types of drugs (notably, narcotics and marijuana), discontinuation of vasoconstrictors, prolonged bed rest (immobility), significant recent weight loss ...
Other drugs of the same family, doxazosin (Cardura) and terazosin (Hytrin), can also cause this phenomenon, though less frequently. The cause is not clear. It occurs more commonly in patients who are salt and fluid volume depleted (as happens due to the use of diuretics ), or were using beta blockers . [ 4 ]
Midodrine, sold under the brand names ProAmatine and Orvaten among others, is a vasopressor or antihypotensive medication used to treat orthostatic hypotension (low blood pressure when standing) and urinary incontinence. [3] [5] [1] It is taken by mouth. [3] [1]
Orthostatic hypotension and syncope are associated with the body's poor ability to control blood pressure without active α-adrenergic receptors. The nasal congestion is exacerbated by changing body positions, because α 1 -adrenergic receptors also control nasal vascular blood flow and alpha blockers inhibit this, in the same way that alpha ...
Rates of orthostatic hypotension in a selection of different clinical trials have been 1.2- to 5-fold higher than those of placebo, ranging from 3.1 to 44% with rasagiline and 0.6 to 33% with placebo. [2] [note 1] Orthostatic hypotension tends to be worst in the first 2 months of treatment and then tends to decrease with time. [2]
Ampreloxetine (INN Tooltip International Nonproprietary Name, USAN Tooltip United States Adopted Name; developmental code name TD-9855) is a selective norepinephrine reuptake inhibitor (NRI) which is under development for the treatment of symptomatic neurogenic orthostatic hypotension (NOH).
Orthostatic syncope refers to syncope resulting from a postural decrease in blood pressure, termed orthostatic hypotension. [1]Orthostatic hypotension occurs when there is a persistent reduction in blood pressure of at least 20mmHg systolic or 10mmHg diastolic within three minutes of standing or being upright to 60 degrees on the head-up tilt table.
The first-dose reaction can also result in tachycardia and orthostatic hypotension, which is characterised by a feeling of extreme dizziness that gets worse with an upright posture. [1] Intravascular volume reduction, or concomitant use of other antihypertensive drugs can also lead to reflex tachycardia and orthostatic hypotension. [8]