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A 59-year-old woman was evaluated in the hypertension clinic in December, 2001, for persistent stage 3 hypertension. She had a 12-year history of hypertension controlled on hydrochlorothiazide monotherapy. However, blood pressure had increased, progressing for approximately 6 months prior to her consultation visit and was refractory to the addition of clonidine and felodipine to her regimen. Some leg swelling and a few episodes of rapid heart beat had been noted. Home and clinic pressures of 180–200/80–110 mm Hg were observed.

Her primary physician had prescribed acetaminophen for osteoarthritic knee discomfort, but the patient's brother, a physician, had also prescribed celecoxib 200 μg q.d. Furthermore, the patient admitted to taking various herbal products for her arthritic condition and to enhance her well-being.

Physical examination revealed an overweight female with a blood pressure of 182/94 mm Hg and a heart rate of 100 beats/min. Heart and lung examinations were normal except for some tachycardia; there were no bruits. Additionally, 1–2+ankle edema was noted. Urinalysis revealed no proteinuria, and serum creatinine was 1.2 mg/dL.

It had not been apparent that the patient was taking celecoxib along with herbal remedies, but when requested to bring in all of her prescription medications, and questioned about herbal products, the extent of her polypharmacy was realized. One of the herbal concoctions contained ginger root. On stopping the celecoxib and herbal formula, a followup blood pressure 3 weeks later was 138/86 mm Hg. Removal of felodipine led to resolution of her edema and palpitations, and she no longer required clonidine.

Two meta-analyses have noted a modest hypertensive effect of nonsteroidal anti-inflammatory agents for individuals already on antihypertensive medications.1,2 In one meta-analysis,1 the mean arterial pressure increase was 6.10 mm for naproxen, 4.77 mm for indomethacin, and 2.86 mm for piroxicam, compared to 2.20 mm for sulindac and −0.30 mm for ibuprofen. In the second meta-analysis,2 only piroxicam produced a statistically significant increase in mean supine pressure of 6.2 mm and, again, sulindac had the least effect. There was a greater increase in blood pressure when nonsteroidal anti-inflammatory medications were prescribed concomitantly with β blockers compared with vasodilators and diuretics.2

The mechanism of nonsteroidal effect possibly is related to the inhibition of synthesis of vasodilatory and natriuretic prostaglandins.3 While for the most part, the worsening of hypertension by the cyclooxygenase-2 inhibitor class of nonsteroidal anti-inflammatory drugs is also modest, cases of more exaggerated effect have been reported.4 Therefore, the reversibility of the hypertension for the patient under discussion probably was entirely due to the removal of celecoxib.

Ginger root is primarily used for dyspepsia and travel sickness but is also thought to possess anti-inflammatory effects.5 The patient under discussion thought she derived some arthritis relief, but stopping the herbal supplement did not result in any change in her condition. While hypertensive effects have not been reported in humans, pressor effects due to ginger have been observed in animal studies.6

Pathophysiologic changes have been described for medication-induced hypertension for several substances (alcohol, licorice, ma huang), may be a mild long-term effect of varying frequency for some medications (nonsteroidal anti-inflammatory agents, erythropoietin, cyclosporine, oral contraceptives), is dose-related for venlafaxine, and may occur almost entirely in patients with preexisting hypertension (sibutramine, carbamazepine). Hypertensive effects may be exhibited only in high catecholamine states, such as the paradoxical propranolol effect in hypoglycemic diabetic patients, or it may be quite transient (nicotine). Occasionally, high blood pressure occurs with drug discontinuation at higher dosages of clonidine and methyldopa. In many instances, the associations are rare. Substances and medications that have been associated with blood pressure elevation are listed in the Table.

Many times we take away these medications in our hypertensive patients without any result. However, it is wise to take a survey of possible alternative sources of medications along with store-bought substances, particularly for an individual who develops a new sustained rise in previously controlled blood pressure.

References

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Table Table.  Medications/Substances Implicated With Blood Pressure Elevation
Herbs/Substances
Alcohol, probable central mechanism7
Amphetamines
Arsenic
Cadmium, acute intoxication, possible occupational exposure in battery factory8
Caffeine, very mild effect9,10
Cigarette smoking, BP may surge up to 30 minutes, may interfere with treatment11,12
Cocaine
Ethylene glycol exposure, usually diastolic hypertension8
Ginger, animal studies6
Ginseng, abuse syndrome6
Glucosamine, usually in diabetics13
Lead, acute intoxication8
Licorice, mimic of primary hyperaldosteronism8
Ma Huang, herbal source of ephedrine14,15
Spider bites (black widow), scorpion bites, associated with bradycardia8
Medications
Aldomet, when added to propranolol16
Anabolic steroids, mild dose-related hypertensive effect8
Bromocriptine, cases of severe hypertension8
Bupropion, may exacerbate baseline hypertension17
Carbamazepine, may aggravate hypertension18
Clonidine, rebound withdrawal generally at doses >1.2 ì/day19
Clozapine, pseudopheochromocytoma syndrome19
Cyclosporin, increased volume retention and renal afferent arteriolar construction; BP up in 25%–30% of nontransplant and 50%–80% of solid organ transplant patients20,21
Danazol, mild dose effect8
Disulfiram, slight BP effect8
Ergot alkaloids, vasoconstriction8
Erythropoietin, SVR increase, BP effect usually within 3 months of dialysis initiation, nonprecise correlation with hematocrit rise21,22
Fentanyl, transient BP rise8
Fluoxetine, serotonin syndrome with MAOIs23
Glucagon, when used for GI and radiologic procedures8
Glucocorticoids, affecting both circulating volume and vascular resistance24
Indinavir, poor retrospective study25
Ketamine, may be a transient severe BP elevation8
Ketoconazole, mimic of primary hyperaldosteronism8
Leflunomide, new disease-modifying drug for rheumatoid arthritis26
Levodopa, following suicidal ingestion8
MAOIs, interaction effect with over-the-counter medications and high tyramine foods8
Meperidine, serotonin syndrome with MAOIs23
Methylphenidate
Mineralocorticoids, even topical administration may cause hypertension associated with hypokalemia, alkalosis, and low renin/aldosterone levels8
Naloxone, transient BP rise8
NSAIDs, mild effect in two meta-analyses1,2
Oral contraceptives, mild sustained hypertension may be severe8
Phenylpropanolamine, removed from market27
Pindolol, related to intrinsic sympathomimetic activity8
Propranolol, rare paradoxical reactions, especially in hypoglycemic diabetics28–30
Ritodrine
Sibutramine
SSRIs, serotonin syndrome with MAOIs31
TCAs, though these agents are more commonly associated with postural hypotension8
Testosterone, topical application in one case report associated with hematocrit rise32
Yohimbine, acute dose-dependent BP effect8
Venlafaxine, dose related nonadrenergic BP effect33
BP=blood pressure; SVR=systemic vascular resistance; MAOIs=monoamine oxidase inhibitors; GI=gastrointestinal; NSAIDs=nonsteroidal anti-inflammatory drug; SSRIs=selective seratonin reuptake inhibitor; TCAs=tricyclic antidepressants