Antihistamines Flashcards
Dimenhydrinate
(Dramamine) 1st gen H1 antagonist
Enters CNS- high sedation, anticholinergic-motion sickness
CI: children
Diphenhydramine
(Benadryl) 1st gen H1 antagonist
Enters CNS- high sedation, anticholinergic-motion sickness
CI: children
Doxylamine
(Unisom)- Sleep aid
1st gen H1 antagonist
Enters CNS- high sedation, anticholinergic-motion sickness
CI: children
Promethazine
(Phenergan) 1st gen H1 antagonist
Anti-emetic
Enters CNS- high sedation, anticholinergic-motion sickness
CI: children
Hydroxyzine
(Atarax, Vistaril) 1st gen H1 antagonist
For vertigo
Enters CNS- high sedation, anticholinergic-motion sickness
CI: children
Brompheniramine
(Bromamine, Dimetane) 1st gen H1 antagonist
moderate sedation
CI: children
Chlorpheniramine (Chlor- Trimeton)
1st gen H1 antagonist
moderate sedation
CI: children
Cyclizine (merezine)
1st gen H1 antagonist
moderate sedation, motion sickness-anticholinergic
CI: children
Clemastine (Tavist)
1st gen H1 antagonist
moderate sedation
CI: children
Meclizine (Bonine)
1st gen H1 antagonist
moderate sedation
CI: children
Loratidine
(Claritin)
2nd gen H1 antagonist -Non sedating, not anticholinergic
OD: arrhythmias
Desloratadine
(Clarinex) - active metabolite
2nd gen H1 antagonist -Non sedating, not anticholinergic
OD: arrhythmias
Certirizine
(Zyrtec)
2nd gen H1 antagonist -Non sedating, not anticholinergic
Mild sedation, may also inhibit histamine release from mast cells
Ok in liver disease
OD: arrhythmias
Levocetirizine
(Zyxal) - R enantiomer
2nd gen H1 antagonist -Non sedating, not anticholinergic
Ok in liver disease
OD: arrhythmias
Acrivistine
Pseudoephedrine
(Semprex)
2nd gen H1 antagonist -Non sedating, not anticholinergic
Ok in liver disease
OD: arrhythmias
Fexofenadine
(Allegra)
2nd gen H1 antagonist -Non sedating, not anticholinergic
OD: arrhythmias
Cromolyn Sodium (Intal, Aarane) Nedcromil (Tilade)
Inhibits release of histamine from mast cells
Inhaled
For astma (esp children)
Azelastine (Astelin NS, Astepro)
Intranasal - Noncompetitive H1 blocker and dec release of histamine
tx: allergic rhinitis