13 results
Effects of H1 Antihistamines at Histamine, Adrenergic, Cholinergic, and Serotonin-Binding Receptors
Cholinergic - Incr Dry mouth, Incr
Effects of H1 Antihistamines ... Appetite Histamine H1 ... Incr Appetite #H1
Stepwise Treatment of Chronic Urticaria
Step 1 - Start second-generation HI antihistamine 

Step 2 - One or
second-generation H1 ... second-generation H1 ... first-generation H1
Some H1 antihistaminic Drugs in Clinical Use
1st Generation Antihistamines:
Ethanolamjnes - Carbinoxamine (Clistin), Dimenhydrinate (salt of diphenhydramine)(Dramamine),
Some H1 antihistaminic ... classes #generation #h1
Medications Used in Allergic Rhinitis
 - Mast Cell Stabilizers
 - H1-antagonists
 - α-Sympathomimetics

#Allergic #Rhinitis #medications #pharmacology
Stabilizers - H1
Management of Anaphylaxis - Interventions
Epinephrine - Bolus, Infusion, Nebulized
Posture
O2
Fluids
Albuterol 
H1-Antihistamines, H2-Antihistamines
Glucocorticoids
Additional Vasopressor
Glucagon
Sugammadex
Methylene blue
Tranexamic acid
ECMO

#anaphylaxis #management #treatment
Fluids Albuterol H1
Drug Treatment of Anaphylaxis and Allergic Reactions
First-Line Therapy 
 - Epinephrine 
 - Oxygen 
 -
Second-Line Therapy - H1
Insomnia Medications

Natural Products:
 • Melatonin
 • Valerian

Hypnotics and Antidepressants
Non-BZDs: increase GABA
 • Eszopiclone
 • Zolpidem
Orexin-receptor antagonist:
Antidepressants: Block H1 ... Antihistamines: block H1
Fulminant myocarditis on POCUS Echocardiogram

Fulminant myocarditis from H1 influenza a few years ago.
Healthy adult --> pericardiocentesis,
myocarditis from H1
Anaphylaxis: Treatments (Acute)
Additional Info:
 • IV steroids may be considered for prevention of late phase reactions.
Ranitidine), to amplify H1
Drugs for Depression and Anxiety Disorders

Selective Serotonin Reuptake Inhibitors
 • Citalopram, Escitalopram, Fluoxetine, Fluvoxamine, Paroxetine, Sertraline,
SERT, NET, a1, H1