Pharm Flashcards
Class of Adenosine
Antiarrhythmic and endogenous nucleoside
Adenosine Dosage
Adult:
Initial - 6mg rapid IV push
Follow up - 12mg rapid push
Amiodarone Class
Class III Antiarrythmic - Lengthens cardiac action potential and slows conduction prolonging refractoriness by blocking K+ channels
Amiodarone Dosage
Adult: VF or PVT - 300mg IV push repeat of 150mg after 10 min.
Unstable VT - 150mg over 10 min
Stable Monomorph WCT - 150mg over 10 min.
Atropine Class
Anticholinergic and Antimuscarinic
Atropine Indications
Restore rhythm in bradydysrythmia Sinus brady with hemo compromise Brady second to AV block Organophosphate poisoning Palliative control of secretions
Atropine Dosage
Bradycardia - 0.6mg IV (max dose 0.04mg/kg)
Organophosphate poisoning - 1-2mg repeat q 30s- 5min.
Secretion - 0.6mg IM
Atropine Contraindications
Hypersensitivity Tachycardia Narrow-angle glaucoma Thyrotoxicosis Prostatic hypertropy Myasthena Gravis
Atropine MOA
Antagonizes ACh at muscarinic M2 receptors producing parasympatholytic effects
Amiodarone MOA
Class III antiarrhythmic, poses characteristics of all classes. Blocks Na channels, antagonizes beta receptors, produces negative chronotropic effects in nodal tissue, lengthens action potential, and slows conduction and prolongs refractoriness by blocking K channels
Calcium Chloride Classification
Electrolyte
CaCl Indications
- Cardiac arrest due to hyperkalemia
- Hyperkalemia with cardiotoxicity
- Ca channel OD with symptomatic bradycardia and hemodynamic instability
Calcium Chloride Dose
Adult dose: - 1g over 3 min. can repeat once after 10 minutes
Peds dose:
CA - 20mg/kg over 3 minutes
other causes 10mg/kg over 15 minutes
CaCl Contraindications
Hypersensitivity
Primary or secondary hypercalcemia
Tissue irritation may occur
Extravasation causes necrosis
Epinephrine Indications
Anaphylaxis Severe Bronchospasm Severe croup Cardiac Arrest Peri Arrest Hypotension Significant bradycardia
Epinephrine dosage in Arrest
Adult: 1mg IV/IO q 3-5 min max- 3-4 doses
Peds: 0.01mg/kg IV/IO q 3-5 min. max. 3-4 doses
Epinephrine - Peri Arrest Hypotension Dosage
Adult - 10mcg IV/IO slow push q2-3
Epi Dosage Adult Bradycardia
2-10 mcg/minute IV/IO infusion
Epinephrine MOA
Acts on alpha and beta receptors. Alpha effects - vasoconstriction, reduces vascular permeability
Beta effects - bronchial smooth muscle relaxation, increased HR, increased cardiac contractility
Epinephrine Pre-arrest anaphylaxis
Adult: 50-100mcg IV/IO
Peds: 5mcg/kg IV/IO
Fentanyl Dose Adult
Initial loading dose 0.5-1.0 mcg/kg max. 100mcg q5minutes up to 300mcg
Maintenance - 50mcg/kg q 10min max. 250mcg/hr
Fentanyl Onset
IV- Immediate
IM - 7-15 minutes
Ipatropium class
anticholinergic bronchodilator
Ipratropium Dose
160mcg (8x20mcg)
Ketamine Indications
Analgesia, Induction, Sedation, Procedural Sedation, Severe agitation
Ketamine Analgesia Dose
IV Analgesia - 0.3mg/kg slow push repeat @ 5min. 0.15mg/kg Max. 0.6 mg/kg in 45 minutes IM 0.5mg/kg
Ketamine Procedural Sedation Dose
0.1-0.5mg/kg slow IV Push q 60 seconds to effect
Ketamine MOA
Ketamine is a non-competitive NMDA receptor antagonist that blocks glutamate. Low doses produce analgesia and modulate central sensitization, hyperalgesia, and opioid tolerance. Reduces polysynaptic spinal reflexes.
Lidocaine MOA
As a sodium channel blocker, lidocaine decreases the duration of the action potential by shortening the period of repolarization.
Magnesium Sulfate MOA
The precise mechanism of action of magnesium sulfate is not entirely clear. It appears to alter membrane potential, slowing conduction and relaxing smooth muscle.
Midazolam MOA
Like other benzodiazepines, MIDAZOLam intensifies the activity of gamma aminobutyric acid, the major inhibitory neurotransmitter in the central nervous system. This action is believed to result in hyperpolarization of neuronal cells, which then take longer to reach threshold and depolarize.
Phenylephrine MOA
Agonizes alpha-adrenergic receptors producing arterial vasoconstriction.
Amiodarone Indications
VF. pVT, unstable VT, Recurrent VT following cardioversion
Amiodarone Contraindications
Hypersensitivity
Cardiogenic Shock
Marked Sinus Bradycardia
Second and Third degree block
Adenosine contraindications
Hypersensitivity
2nd and 3rd degree AV block or sick sinus without a pacemaker
Adenosine Pharmacokinetics
Onset - immediate
Peak - immediate
Duration <10s
Adenosine Indications
Conversion and termination of SVT
Amiodarone Phamacokinetics
2-2-2
Onset - 2 minutes
Peak - 20 minutes
Duration 2 hours
Atropine Pharmacokinetics
Onset - <2 minutes
Peak - 2-4 min IV
Duration 2-6 hours
Calcium Chloride Pharmacokinetics
Onset 5-15 minutes
Duration - Dose-dependent may persist up to 4 hrs
Calcium Chloride MOA
Essential for nerve conductions, muscle contraction and coagulation. Administered to improve myocardial contractility and ventricular automaticity
In hyperkalemia causes an increase in threshold potential and restoration of gradient between resting potential and threshold potential
Epinephrine Pharmacokinetics
Onset - 30s IV; 30-90s IM
Peak - 3-5min IV; 4-10min IM
Duration - 5-10 min
Fentanyl Contraindications
Hypersensitivity Myasthenia gravis Pre-existing resp depression Acute Asthma Upper airway obstruction
Fentanyl Pharmacokinetics
Onset - Immediate (IV); 7-15 min(IM)
Peak - <5min(IV); 2min (IN); 1-2 hrs (IM)
Duration 30-60 min(IV); 1-2 hrs(IM)
Fentanyl Indications
Moderate or severe pain
Adjunct to awake intubation
Fentanyl MOA
Inhibits ascending pain pathways in CNS, alters pain perception by binding to operate receptors producing analgesia and euphoria
Ipatropium Contraindications
Hypersensitivity
Ipatropium Indications
Severe bronchospasm
Ipatropium Pharmacokinetics
Onset 3-5 minutes
Peak - 1.5 -2 hrs
Duration - 6 hrs
Ketamine Contraindications
Hypersensitivity
Unable to manage adverse effects
Conditions where elevated BP may be harmful
Age <6 months
Ketamine Pharmacokinetics
Onset - 30s
Duration - 5-10 minutes with recovery 1-2 hrs
Ketamine Induction dose
Shock index >1 1mg/kg
Shock index <1 2mg/kg
Lidocaine contraindications
Hypersensitivity
Third degree AV block
Vent escape rhythm
WPW
Lidocaine Pharmacokinetics
Onset - 45-90 s
Peak - 5-10 min
Duration - 10 - 20 min (IV)
Lidocaine Indications
Control of ventricular arrhythmias
Local anesthesia during IO or awake intubation
Magnesium Sulfate Contraindications
Hypersensitivity
Second or third degree AV block
Magnesium Sulfate Pharmacokinetics
Onset 1-2 minutes
Peak <5 min
Duration- 30 min as anticonvulsant
Magnesium Sulfate Indications
VF or VT refractory to first line treatment
Recurrent intermittent episodes of WCT
Torsades
Bronchospasm in acute asthma refractory to bronchodilators
Seizures in pregnancy with associate HTN
Midazolam Contraindications
DLOC Hypotension Shock Hypersensitivity Acute narrow angle glaucoma
Midazolam indications
Sedation of agitated pt
Control of seizures
Anesthesia maintenance
Nitro contraindications
Hypersensitivity Use of sildenafil or vardenafil within 24 hours Use of tadalafil within 48 hours Severe anemia Tamponade or restrictive pericarditis Right sided MI Hypotension
Nitro Pharmacokinetics
Onset - 30s-2 min (SL)
Peak - 5-10 min (SL)
Duration 15-30 min
Phenylephrine Contraindications
Hypersensitivity
Hypersensitivity to sulfites
Severe HTN or VTach
Pheochromocytoma
Sodium Bicarbonate Contraindications
Suspected metabolic alkalosis
Hx of excessive vomiting (excessive Cl- loss)
Sodium Bicarb dosage
1mEq/kg repeat half dose q 10-15min
Sodium Bicarb MOA
Buffers or neutralizes excess acid raising pH
Sodium Bicarb Pharmacokinetics
Onset 1-2 minutes
Peak 30 min
Duration 1-2 hrs
Sodium Bicarb Indications
Known or suspected hyperkalemia
TCA or Salicylate OD
Suspected or confirmed metabolic acidosis
Pretreatment prior to weight release in crush injury