Home Drug Study Amlodipine (Norvasc) Drug Study

Amlodipine (Norvasc) Drug Study

Amlodipine-Drug-Study
Generic Name:
Amlodipine
Brand Name: Norvasc
Classifications:  cardiovascular agent; calcium channel blocker
Pregnancy Category:C

Availability  2.5 mg, 5 mg, 10 mg tablets

Actions
Amlodipine is a calcium channel blocking agent that selectively blocks calcium ion reflux across cell membranes of cardiac and vascular smooth muscle without changing serum calcium concentrations. It predominantly acts on the peripheral circulation, decreasing peripheral vascular resistance, and increases cardiac output.

Therapeutic effects
Amlodipine reduces systolic, diastolic, and mean arterial blood pressure.

Uses   
Treatment of mild to moderate hypertension and angina.

Contraindications
Hypersensitivity to amlodipine.

Route & Dosage

Hypertension
adult:PO  5–10 mg once daily
geriatric:start with 2.5 mg, adjust dose at intervals of not less than 2 wk

Renal Impairment
Start with 2.5 mg, adjust dose at intervals of not less than 2 wk

Administration

Oral
Give drug without regard to meals.
Prescribed initial dosages of 2.5 mg daily are common if added to a regimen including other antihypertensive drugs.Note: Doses are usually titrated over a period of 14 d or more rapidly if warranted.
Store at 15°–30° C (59°–86° F).

Adverse effects
CV:Palpitations, flushing tachycardia, peripheral or facial edema, bradycardia, chest pain, syncope, postural hypotension.
CNS:Light-headedness, fatigue, headache.
GI:Abdominal pain, nausea, anorexia, constipation, dyspepsia, dysphagia, diarrhea, flatulence, vomiting.
Urogenital:Sexual dysfunction, frequency, nocturia.
Respiratory:Dyspnea.
Skin:Flushing, rash.
other:Arthralgia, cramps, myalgia.
Nursing Implications  

Assessment & Drug Effects

  • Monitor BP for therapeutic effectiveness. BP reduction is greatest after peak levels of amlodipine are achieved 6–9 h following oral doses.Monitor for S&S of dose-related peripheral or facial edema that may not be accompanied by weight gain; rarely, severe edema may cause discontinuation of drug.
  • Monitor BP with postural changes. Report postural hypotension. Monitor more frequently when additional antihypertensives or diuretics are added.
  • Monitor heart rate; dose-related palpitations (more common in women) may occur.

Patient & Family Education

  • Report significant swelling of face or extremities.
  • Take care to have support when standing & walking due to possible dose-related lightheadedness/dizziness.
  • Report shortness of breath, palpitations, irregular heartbeat, nausea, or constipation to physician.
  • Do not breast feed while taking this drug without consulting physician.
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