EPINEPHRINE Flashcards
MECHANISM OF ACTION
A1 AGONIST—-SECOND MESSENGER RELEASE OF CALCIUM IN VSMC—-PERIPHERAL VASOCONSTRICTION—– INCREASED SVR–INCREASED BP
B1 AGONIST—–INCREASED INTRACELLULAR CA2IN CARDIAC CELLS- POSITIVE INOTROPY. CHRONOTROPY DROMOTROPY
B2 AGONIST BRONCHIAL SMOOTH MUSCLE RELAXATION— BRONCHODILATION BLOCKS RELEASE OF CALCIUM IN AN SUBSEQUENT DESTRUCTION OF MAST CELLS
DRUG CLASSIFICATION
SYMPATHOMIMETIC/SYMPATHETIC AGONIST/ CATECHOLAMINE
ONSET OF ACTION?
<2 MINUETS IV 3-10 MINUTES IM
PEAK EFFECTS
<5 MINUTES IV, 20MINUTES IM
DURATION OF EFFECT
5-10 IV 20-30 IM
HALF LIFE
5 MINUTES IV
INDICATIONS FIELD USE?
CARDIAC ARREST
ANAPHYLAXIS/SEVERE REACTIVE AIRWAY DISEASE/ASTHMA
SYMPTOMATIC BRADYCDIA/HYPOTENSION
CONTRINDICATIONS
TACHYDYSRHYTHMIAS
SIDE EFFECTS / ADVERSE REACTIONS
ANXIETY HA DYSRHYTHMIAS TREMULOUSNESS DIZZINESS N+V
DOSE CARDIAC ARREST
ADULT 0.5-1MG RAPID IV, IO (1:10,000) Q 3-5 MIN
PEDI 0.01 MG/KG (1:10,000) RAPID IV, IO Q 3-5 MIN
DOSE ANAPHYLAXIS/ASTHMA
ADULT 0.3-0.5 MG (1:1000) IM
PEDI 0.01 MG/KG (1:1000) IM MAX 0.3MG THEN 0.01 MG/KG 1:10,000 SLOW IV,IO
PRECAUTIONS
SHOULD BE PROTECTED FROM LIGHT
CAUTION WITH CAD AND PREGNANCY
LEADS TO INCREASE IN MYOCARDIAL OXYGEN DEMAND
DRUG-DRUG INTERACTIONS
PH DEPENDENT DEACTIVATED BY ALKALINE SOLUTIONS; EFFECTS INTENSIFIED WITH PT’S TAKING ANTIDEPRESSANTS, REACTS WITH CACL2 AND NAHCO3 TO FORM PPT IN IV TUBING.