Drug Profiles: Winter Final Flashcards
Vasopressin: Mechanism of Action
In high doses, vasopressin acts as a non-adrenergic peripheral vasoconstrictor. When given during CPR, vasopressin increases coronary perfusion pressure.
Diltiazem: Contraindications
Should not be administered to any patient with hypotension, cardiogenic shock, VT, or A flutter, and A fib with WPW (may percipitate ventricular fibrillation).
Succinylcholine: Pharmacokinetics
Onset: 1-2 minutes. Duration: 6-10 minutes.
Rocuronium (Zemuron): Precautions
Not routinely used in EMS as the initial paralytic due to the long duration of action.
Vasopressin: Pharmacokinetics
Onset:
Succinylcholine: Contraindications
Hyperkalemia, history of malignant hyperthermia, penetrating eye injury, neuromuscular disorder (MS), Paralysis >1 day, crush injury >3 days.
Succinylcholine: Mechanism of Action
Combines with cholinergic receptors in motor nerves to cause depolarization. Neuromuscular transmission is inhibited, causing temporary skeletal paralysis, untill it is metabolizedand the cells become repolarized.
Vasopressin: Precautions
Do not give to patients with perfusing rhythms.
Diltiazem: Dosage
0.25 mg/kg or 2 minutes Repeat 0.35 mg/kg if no response in 15 minutes. Maintenance infusion of 5-15 mg/hr
Succinylcholine: Class
Depolarizing neuromusculaar blocking agent.
Diltiazem: Pharmacokinetics
Onset: Immediate Peak: Immediate Duration: 1-3 hours
Etomidate: Note
Etomidate is able to lower ICP while maintaining CPP, making it a useful agent in patients with increased ICP.
Rocuronium (Zemuron): Interactions
Intensity and duration, or paralysis may be prolonged by pretreatment with succinylcholine, general anesthesia (inhalation), lidocaine, quinidine, procainamide, beta-adrenergenic-blocking agents, potassium-losing diuretics, or magnesium.
Rocuronium (Zemuron): Dosage
RSI: 0.6 mg/kg
Vasopressin: How Supplied
20 units/ml vial
Vasopressin: Dosage
Single bolus dose of 40 units IV. After 3 to 5 minutes, if no response, give 1 mg Epi doses
Rocuronium (Zemuron): Description
A non-depolarizing neuromuscular blocking agent with rapid to intermediate onset, depending on dose, and intermediate duration of action.
Ketamine: Mechanism of action
Phencyclidine derivitive causes “dissociative anaesthesia” characterized by profound analgesia and amnesia with retention of protective airway reflexes, spontaneous respirations and cardiopulmonary stability. Dissociative anesthesia results in a patient who does not appear to be anesthetized and can swallow and open eyes but does not process information or pain. Other actions: keeps airway reflexes intact; releases endogenous catecholamines; maintaines BP and heart rate; relaxes bronchial muscles; stimulates beta receptors in the lungs.
Rocuronium (Zemuron): Contraindications
None in EMS.
Etomidate: Mechanism of Action
Decreases activity of the reticular formation in the brain with minimal cardiac and respiratory effects.
Ketamine: Contraindications
Coronary artery disease, pregnany, infants < 3 months; tracheal stenosis or tracheomalacia, acute globe injury or laucoma; schizophrenia.
Ketamine: Pharmacokenetics
Onset: 30-60 seconds Duration: 5-15 minuets
Vasopressin: Class
Anti-diuretic hormone.
Diltiazem: Class
Calcium Channel Blocker
Succinylcholine: Indications
To achieve temporary paralysis when endotrachial intubation is indicated and muscletone impedes successful intubation.
Ketamine: Precautions
Administer with midazolam 2.5 mg IV/IO in adults to prevent/treat negitive emergnce reaction (not necessary in peds); monitor for laryngospasm (0.1%)
Diltiazem: Precautions
Can cause systemic hypotension (blood pressure should be constantly monitored). Calcium can be used to prevent the hypotensive effecs of calcium hannel blockers and in the management of calcium channel blocker OD.
Succinylcholine: Note
Store in refrigerator at 2-8 deg C (36-46 deg F). The multi dose vials are stable for upto 14 days at room temprature without significant loss of potency.
Ketamine: Side effects
Emergence reaction (5-30%); may cause hypertension, increase cardiac output and myocardial oxygen consumption; may transiently increase intracranial pressure and cardiac perfusion pressure.
Etomidate: Indications
General anasthesia, EMS intuation.
Rocuronium (Zemuron): pharmacokinetics
Onset: 60-90 seconds Duration: 30 minutes
Etomidate: Pharmacokinetics
Onset: 10-20 seconds Duration: 3-5 minutes
Etomidate: Class
General anasthetic.
Vasopressin: Indications
Ventricular fibrillation, pulseless VT, PEA, and or asystole.
Etomidate: Contraindications
None in prehospital.
Rocuronium (Zemuron): Indications
Rapid sequence intubation, maintenance of desired paralysis.
Rocuronium (Zemuron): Side Effects
Bronchospasm; associated with a slight elevation of the heart rates and BP. Tachycardia may occur in pediatric patients.
Diltiazem: Interactions
Should not be administered to patiens recieving IV B-blockers because of an increased risk of CHF, bradycardia, and asystole
Etomidate: Dosage
0.3 mg/kg IV. Max 20 mg.
Etomidate: Side effects
Involuntary muscle movements (myoclonus - rarely seen due to concurrent administration of paralytics)
Succinylcholine: Side Effects
Arhythmias, bradycardia, increased inraoccular pressure, increased intracrainial pressure, hyperkalemia.
Vasopressin: Contraindications
None in EMS.
Vasopressin: Side Effects
None in cardiac arrest.
Ketamine: Indications
Analgesia and sedation for painful procedures or painful conditions; induction agent for RSI (instead of etomidate).
Succinylcholine: Precautions
Make sure all intubation equipment is ready prior to administration of succinylcholine. Be wary of a patient’s potential to become bradycardicduring RSI, especially patients with CHF.
Diltiazem: Mechanism of Action
Diltiazem interferes with the entry influ of calcium into cardiac and vascular smooth muscle. In addition it slowes the rate of the SA node and the conduction velosity through the AV node. Diltiazem’s ability to relax coronary arteries, as well as its negitive inotropic and negitive chronotropic qualities makes it a useful antianginal. It is also used as an antihypertensive. however in the EMS setting, we use it primarily as an antidysrhythmic so its ability to slow the conduction through the AV node is most pertinent.
Ketamine: Class
Sedative, Analgesic
Succinylcholine: Dosage
Adult: 1-2 mg/kg IV (IM if in protocol) Pediatric: 2 mg/kg IV
Ketamine: Dosage
Induction agent: 2 mg/kg IV/IO Analgesia, sedation:
Diltiazem: Indications
To control rapid ventricular rates associated with atrial fibillation and atrial flutter, and SVT refractory to adenosine.
Diltiazem: Side Effects
Dizziness, headache, bradycardia, heart block, hypotension, and asystole.
Rocuronium (Zemuron): Mechanism of Action
Competitively binds to cholinergic receptors. Reversible in the presence of acetylcholinesterase inhibitors, such as neostigmine.
Rocuronium (Zemuron): Class
Non-depolarizing neuromuscular blocker.
Ketorolac: indications
mild to moderate pain
Calcium Gluconate: side effects
Tissue necrosis if given subcutaneously, or if it extravasates.
Calcium Chloride: pharmacokinetics
onset: immediate peak: immediate
Droperidol: dosage
14-60 y/o: 2.5-5 mg IV/IM (may be combined with 2 mg midazolam in same syringe for increased sedation), may be repeated once as needed. Over 60 y/o: 2.5 mg IV/IM (with or without midazolam). Not recommended as first-line N&V med because of “black box” warning from FDA.
Sodium Bicarbonate: contraindications
none prehospital setting
Promethazine: side effects
Drowsiness, sedation, blurred vision, tachycardia, bradycardia, and dizziness
Magnesium Sulfate: interactions
may block effects of digitalis