Epinephrine
1:1000 IM 0.3 - 0.5mg (0.3 - 0.5mL) every 5 - 15 minutes
Give as soon as possible
Always IM initially 
If response to IM is inadequate: give epinephrine infusion 1:10,000 2 - 10 µg/min
How to make a quick epinephrine drip: Take your code-cart epinephrine (it does not matter if it is 1:1,000 or 1:10,000) and inject 1mg into a liter bag of NS.  Final concentration is 1mcg/ml.  Run at 1cc/min and titrate to effect.
Pediatric: Epinephrine 1:1000 0.01mg/kg (max 0.5mg) IM every 5 to 15 minutes
IV infusion: 0.05 - 1 mcg/kg/min
Supplemental oxygen
Consider endotracheal intubation if airway edema present
Normal saline bolus
If unresponsive to epinephrine assume distributive shock and give 1 - 2 liters of normal saline
Also consider
Albuterol for bronchospasm resistant to IM epinephrine
Antihistamines (for symptom control AFTER hemodynamically stable)
Diphenhydramine: 25 to 50mg IV (1mg/kg in children)
Ranitidine: 50mg IV (0.5mg/kg in children) (has been found to improve urticaria but not angioedema at 2 hours)
AVOID promethazine as this can worsen hypotension
Glucocorticoid
MAY blunt biphasic reaction although little evidence to support usage
Methylprednisolone: 125mg IV (2mg/kg in children)
Dexamethasone: 10mg IV or PO (0.6mg/kg in children)
Glucagon
1 - 5mg IV over 5 minutes followed by infusion of 5 - 15 µg/min
If taking beta-blocker AND unresponsive to epinephrine
Consider adding additional pressor support if persistent hypotension present
For example: vasopressin 2-8 units for persistent refractory shock (case series only)
Norepinephrine 0.05 to 0.5 mcg/kg per minute
1:1000 IM 0.3 - 0.5mg (0.3 - 0.5mL) every 5 - 15 minutes
Give as soon as possible
Always IM initially 
If response to IM is inadequate: give epinephrine infusion 1:10,000 2 - 10 µg/min
How to make a quick epinephrine drip: Take your code-cart epinephrine (it does not matter if it is 1:1,000 or 1:10,000) and inject 1mg into a liter bag of NS.  Final concentration is 1mcg/ml.  Run at 1cc/min and titrate to effect.
IV infusion: 0.05 - 1 mcg/kg/min
Consider endotracheal intubation if airway edema present
If unresponsive to epinephrine assume distributive shock and give 1 - 2 liters of normal saline
Albuterol for bronchospasm resistant to IM epinephrine
Antihistamines (for symptom control AFTER hemodynamically stable)
Diphenhydramine: 25 to 50mg IV (1mg/kg in children)
Ranitidine: 50mg IV (0.5mg/kg in children) (has been found to improve urticaria but not angioedema at 2 hours)
AVOID promethazine as this can worsen hypotension
Glucocorticoid
MAY blunt biphasic reaction although little evidence to support usage
Methylprednisolone: 125mg IV (2mg/kg in children)
Dexamethasone: 10mg IV or PO (0.6mg/kg in children)
Glucagon
1 - 5mg IV over 5 minutes followed by infusion of 5 - 15 µg/min
If taking beta-blocker AND unresponsive to epinephrine
Consider adding additional pressor support if persistent hypotension present
For example: vasopressin 2-8 units for persistent refractory shock (case series only)
Norepinephrine 0.05 to 0.5 mcg/kg per minute
Diphenhydramine: 25 to 50mg IV (1mg/kg in children)
Ranitidine: 50mg IV (0.5mg/kg in children) (has been found to improve urticaria but not angioedema at 2 hours)
AVOID promethazine as this can worsen hypotension
MAY blunt biphasic reaction although little evidence to support usage
Methylprednisolone: 125mg IV (2mg/kg in children)
Dexamethasone: 10mg IV or PO (0.6mg/kg in children)
1 - 5mg IV over 5 minutes followed by infusion of 5 - 15 µg/min
If taking beta-blocker AND unresponsive to epinephrine
For example: vasopressin 2-8 units for persistent refractory shock (case series only)
Norepinephrine 0.05 to 0.5 mcg/kg per minute
Anaphylaxis
Allergic reaction/urticaria
Heat tetany
Laryngospasm
Angioedema
Cold urticaria
Anxiety attack
Flash pulmonary edema