| Term 
 | Definition 
 
        | stabilize mast cell membrane and prevent degranulation |  | 
        |  | 
        
        | Term 
 
        | diphenhydramine (benadryl) |  | Definition 
 
        | 1st gen H1 Antagonist Use - hay fever, urticaria, motion sick
 adr- VERY SEDATING
 |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | 1st gen H1 antagonist   use: motion sickness |  | 
        |  | 
        
        | Term 
 
        | H1 first gen v second gen |  | Definition 
 
        | 1st gen have H2 and muscarinic SE's   1st gen cross BBB and cause sedation and anticholinergic activity ( inhibit learning)  |  | 
        |  | 
        
        | Term 
 
        | Dimenhydrinate Diphenhydramine
 Chlorpheniramine
 Doxylamine
 Hydroxyzine
 Cyclizine
 Meclizine
 Promethazine
 |  | Definition 
 | 
        |  | 
        
        | Term 
 | Definition 
 
        | 2nd gen H1 Antagonist No sedation
 Do NOT mix with antacid due to decreased bioavailability.
 |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | 2nd Gen H1 Antagonist Mild sedative
 |  | 
        |  | 
        
        | Term 
 
        | Fexofenadine Loratidine
 Cetirizine
 |  | Definition 
 | 
        |  | 
        
        | Term 
 
        | Cimetidine Nizatidine
 Famotidine
 Ranitidine
 |  | Definition 
 
        | H2 Receptor Blockers Use- GI disturbances
 Cimetidine - endocrine (gynocomastia, galactorrhea), CNS prob in elderly
 |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | H1 receptor antagonist - treat allergies and motion sickness   H2 antagonists- inhibit acid secretion, peptic ulcer disease, gerd |  | 
        |  |