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Pronunciation |
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(re
SER
peen) |
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U.S. Brand
Names |
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Serpalan® |
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Generic
Available |
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Yes |
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Canadian Brand
Names |
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Novo-Reserpine |
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Pharmacological Index |
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Rauwolfia Alkaloid |
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Use |
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Management of mild to moderate hypertension |
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Pregnancy Risk
Factor |
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C |
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Contraindications |
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Hypersensitivity to reserpine or any component; depression (especially with
suicidal tendencies); active peptic ulcer; ulcerative colitis; patients
receiving electroconvulsive therapy |
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Warnings/Precautions |
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Use extreme caution in treating patients with a history of depression; watch
for signs and symptoms of depression. Discontinue at the first sign of
depression. Use cautiously in patients with a history of PUD (increases GI
motility and secretion) or gallstones (biliary colic may be precipitated).
Preoperative withdrawal does not ensure circulatory stability. Make
anesthesiologist aware of medical regimen. Avoid in severe renal impairment.
Avoid use with monoamine oxidase inhibitors. |
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Adverse
Reactions |
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Cardiovascular: Peripheral edema, arrhythmias, bradycardia, chest pain, PVC,
hypotension
Central nervous system: Dizziness, headache, nightmares, nervousness,
drowsiness, fatigue, mental depression, parkinsonism, dull sensorium, syncope,
paradoxical anxiety
Dermatologic: Rash, pruritus, flushing of skin
Gastrointestinal: Anorexia, diarrhea, dry mouth, nausea, vomiting, increased
salivation, weight gain, increased gastric acid secretion
Genitourinary: Impotence, decreased libido
Hematologic: Thrombocytopenia purpura
Ocular: Blurred vision
Respiratory: Nasal congestion, dyspnea, epistaxis |
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Overdosage/Toxicology |
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Symptoms of overdose include hypotension, bradycardia, CNS depression,
sedation, coma, hypothermia, miosis, tremors, diarrhea, vomiting
Hypotension usually responds to I.V. fluids or Trendelenburg positioning. If
unresponsive to these measures, the use of a parenteral inotrope may be required
(eg, norepinephrine 0.1-0.2 mcg/kg/minute titrated to response). Anticholinergic
agents may be useful in reducing the parkinsonian effects and bradycardia.
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Drug
Interactions |
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MAO inhibitors: Reserpine may cause hypertensive reactions; use an
alternative antihypertensive. |
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Stability |
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Protect oral dosage forms from light |
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Mechanism of
Action |
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Reduces blood pressure via depletion of sympathetic biogenic amines
(norepinephrine and dopamine); this also commonly results in sedative
effects |
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Pharmacodynamics/Kinetics |
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Onset of antihypertensive effect: Within 3-6 days
Duration: 2-6 weeks
Absorption: Oral: ~40%
Distribution: Crosses the placenta; appears in breast milk
Protein binding: 96%
Metabolism: Extensively in the liver, >90%
Half-life: 50-100 hours
Elimination: Principal excretion in feces (30% to 60%) and small amounts in
urine (10%) |
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Usual Dosage |
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Oral (full antihypertensive effects may take as long as 3 weeks):
Adults:
Hypertension: 0.1-0.25 mg/day in 1-2 doses; initial: 0.5 mg/day for 1-2
weeks; maintenance: reduce to 0.1-0.25 mg/day
Psychiatric: Initial: 0.5 mg/day; usual range: 0.1-1 mg
Elderly: Initial: 0.05 mg once daily, increasing by 0.05 mg every week as
necessary
Dosing adjustment in renal impairment: Clcr <10
mL/minute: Avoid use.
Dialysis: Not removed by hemo- or peritoneal dialysis; supplemental dose is
not necessary. |
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Monitoring
Parameters |
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Blood pressure, standing and sitting/supine |
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Test
Interactions |
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catecholamines
(U) |
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Cardiovascular
Considerations |
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Currently, reserpine is used only infrequently for treatment of hypertension.
An important side effect is drowsiness. It is important that reserpine be
discontinued at least 1 week before elective electroshock
therapy. |
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Dental Health: Local
Anesthetic/Vasoconstrictor
Precautions |
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No information available to require special precautions |
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Dental Health:
Effects on Dental Treatment |
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>10% of patients experience dry mouth |
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Patient
Information |
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Take as directed; do not discontinue without consulting prescriber. May take
up to 2 weeks to see effects of therapy. Avoid alcohol and maintain recommended
diet. You may experience nervousness, dizziness, or fatigue; use caution when
driving or engaging in hazardous activities until response to drug is known.
Rise slowly from sitting or lying position until response to therapy is known.
Small frequent meals or sucking lozenges may reduce nausea or loss of appetite;
adequate dietary fruit, fluids, and fiber may reduce constipation. You may
experience nasal stuffiness; avoid OTC medications, and consult prescriber. You
may experience impotence; will resolve when medication is discontinued. Report
chest pain, rapid heartbeat or palpitations, difficulty breathing, sudden
increase in weight, swelling in ankles or hands, black tarry stools; or unusual
feelings of depression. Pregnancy/breast-feeding precautions: Inform
prescriber if you are or intend to be pregnant. Consult prescriber if
breast-feeding. |
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Nursing
Implications |
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Observe for mental depression and alert family members to report any
symptoms |
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Dosage Forms |
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Tablet: 0.1 mg, 0.25 mg |
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References |
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Adelman AM, Daly MP, and Michocki RJ, "Alternate Drugs," Clin Geriatr
Med, 1990, 6(2):423-44.
Rogal PP, Rakitin VA, Boichak MP, et al, "Fatal Reserpine Poisoning," Sud
Med Ekspert, 1989, 32(1):51-2.
Zsoter TT, Johnson GE, DeVeber GA, et al,
"Excretion and Metabolism of Reserpine in Renal Failure," Clin Pharmacol
Ther, 1973, 14(3):325-30. |
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