In patients with orthostatic hypotension, which medications should be tapered, discontinued, or titrated?

Medications to Titrate in Orthostatic Hypotension

Immediately discontinue or reduce diuretics, vasodilators (especially calcium channel blockers and alpha-blockers), and psychotropic medications that do not alter prognosis, as these are the most common culprits of drug-induced orthostatic hypotension. 1, 2

Priority Medication Review Algorithm

First-Line Medications to Discontinue or Reduce:

1. Diuretics - Most frequent cause of drug-induced orthostatic hypotension 1

   • Stop or reduce loop diuretics first
   • Discontinue combination diuretic therapy as early as possible 3
   • Be extremely careful with multiple diuretics as they greatly increase hypotension risk 3

2. Vasodilators that don't improve mortality:

   • Alpha-blockers (including tamsulosin for prostate) - reduce or discontinue 3, 4
   • Calcium channel blockers - reduce or discontinue if possible 3
   • Note: In heart failure patients, these can be stopped without affecting prognosis 3

3. Psychotropic medications:

   • Tricyclic antidepressants 5
   • Phenothiazines 5
   • Trazodone 4
   • Tizanidine 4

4. Other commonly overlooked medications:

   • Sildenafil (PDE5 inhibitors) 4
   • Carvedilol (non-selective beta-blockers worse than selective) 4
   • Chronic vasodilator therapy 1

Medications to Switch Rather Than Stop:

For patients with supine hypertension and orthostatic hypotension, switch BP-lowering medications that worsen orthostatic hypotension to alternative therapies rather than simply de-intensifying treatment. 2

• Preferred antihypertensives in OH patients:

  • Angiotensin receptor blockers (ARBs) 4
  • Long-acting dihydropyridine calcium channel blockers 4
  • These are better tolerated than other classes

• Avoid in OH:

  • Non-selective beta-blockers (use cardioselective if needed) 6
  • Alpha-blockers 3
  • Short-acting vasodilators

Medications to Carefully Titrate (Not Stop):

For patients requiring evidence-based therapies (heart failure, post-MI), use these strategies rather than discontinuation 3:

1. Stagger vasoactive medications - no two drugs within 2 hours of each other 3
2. Split into smaller, more frequent doses 3
3. Give beta-blockers with meals to slow absorption 3
4. Titrate more slowly and avoid titration during hypovolemia 3
5. Administer at bedtime for short-acting antihypertensives in isolated supine hypertension 4

Special Considerations:

• In heart failure patients: Most clinicians stop mineralocorticoid receptor antagonists (MRAs) and reassess before stopping ACE inhibitors or ARBs 3

• In diabetic autonomic neuropathy: Avoid drugs that reduce heart rate variability; exclude medications exacerbating orthostatic hypotension before starting specific OH treatments 6, 5

• Alcohol: Commonly associated with orthostatic intolerance through both acute CNS effects and volume depletion - avoidance is the primary strategy 1

Critical Pitfall to Avoid

Do not simply reduce all antihypertensive medications indiscriminately. Uncontrolled hypertension actually worsens orthostatic hypotension 4. The goal is selective medication optimization: eliminate drugs without mortality benefit while maintaining evidence-based therapies using the timing and dosing strategies above.

The medication review should occur before initiating pharmacological treatment for orthostatic hypotension (midodrine, droxidopa, fludrocortisone), as drug-induced autonomic failure is the most frequent cause of orthostatic hypotension 1.