Resistant hypertension

Failure to reach goal BP in patients taking full doses of an appropriate 3-drug therapy regimen that includes a diuretic. Reasons include
- Improper BP measurement
- Drug-induced
  - Nonadherence (e.g., due to drug side effects, finances)
  - Illegal drugs (e.g., cocaine, amphetamines)
  - Inadequate drug dosages
  - Inappropriate combinations of drug therapy
  - Nonsteroidal anti-inflammatory drugs
  - Sympathomimetics (e.g., decongestants, diet pills)
  - Oral contraceptives
  - Corticosteroids
  - Cyclosporine and tacrolimus (Prograf)
  - Erythropoietin
  - Licorice
  - Some chewing tobacco
  - Selected over-the-counter dietary or herbal supplements and drugs (e.g., ma huang, bitter orange)
- Associated conditions
  - Increasing obesity
  - Excess alcohol intake
- Identifiable causes of secondary hypertension

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