Allergic Rhinitis Flashcards
Allergic Rhinitis: Symptoms / characteristics of inflammatory response
IgE inflammatory response
- Nasal congestion
- Rhinorrhea- runny nose
- Sneezing
- Nasal itching
- Lacrimation- teary eyes
Types of AR
Seasonal Allergic Rhinitis(SAR): seasonal aeroallergens- depends on where you are
Perennial Allergic Rhinitis (PAR): year-round environmental allergens
Intermittent Allergic Rhinitis: determined by frequency of exposure- <4 days per week or <4 weeks per year
Persistent Allergic Rhinitis: persistent sxs- >4 days per week or >4 weeks per year
Episodic Allergic Rhinitis: contact w exposure that is not normally part of pt’s environment
Tx does not differ- these are just ways to categorize
Asthma & AR:
similar inflammatory components, increase AR in asthmatic pts, asthma + AR = worse outcomes for pts
Agents for AR
Oral Antihistamines
Intranasal antihistamines
Intranasal Corticosteroids
Intranasal Agents
Ophthalmic Agents
Leukotriene Receptor Antagonists (LRAs)
Oral Antihistamines: Agents
1st Gen
Diphenhydramine (Benadryl)
2nd Gen
Loratadine (Claritin)-
Desloratadine (clarinex)-
Fexofenadine (Allegra)-
Cetirizine (Zyrtec)-
Levocertirizine (Xyzal)-
Oral Antihistamines: Indications
For sneezing and itching
Oral Antihistamines: which agent most sedating and most anticholinergic effects?
Diphenhydramine (Benadryl) (1st gen)
25-50mg QID
OAs: which less sedating? 1st or 2nd gen?
2nd gen
Least sedating second Gen OA?
Fexofenadine (Allegra)
Dosing: 1st vs second gen OAs
1st: QID
2nd: QD
Best tolerated oral antihistamine?
Cetirizine (Zyrtec)- second gen
Which OAs have a SE of urinary retention?
Cetirizine (Zyrtec) and Levocertirizine (Xyzal) - second gens
Which OA is a L-enantiomer of cetirizine (mirror image)?
Levocertirizine (Xyzal)- – controversy over whether same response
Intranasal antihistamines: Agents
Olapatadine (Patanase)
Azelastine (Astelin)
Azelastine/Fluticasone (Dymista)
Intranasal antihistamines: indications and dosing
- Seasonal, perennial, episodic AR
- Better against nasal congestion v OAs
- Indicated when Sx affect QoL
- Daily or PRN (whereas need PO daily)
Intranasal antihistamines: ADRs
- bitter taste, nose bleeds, HA
- More $$ than OAs
Intranasal Antihistamines: advantages over OAs
- Daily or PRN (need PO daily)
- Better against nasal congestion v OAs
- Rapid onset v OA
- Increased dosing frequency v OA
Most effective Tx option for symptom control of AR?
Intranasal antihistamines
Olapatadine (Patanase): dosing
1 spay bid
Azelastine (Astelin): dosing
1-2 sprays bid
Azelastine/Fluticasone (Dymista): dosing
1 spray bid
Intranasal antihistamine: Most $$
Olapatadine (Patanase)
ALLERGIC RHINITIS: Intranasal Corticosteroids - agents
- Triamcinolone Acetonide (Nasacort)
- Budesonide (Rhinocort AQ)
- Flunisolide (Nasalide)
- Fluticasone (Flonase or Veramyst)
- Mometasone furoate (Nasonex)
- Ciclesonide (Omnaris)
Triamcinolone Acetonide (Nasacort): ADRs
pharyngitis, epistaxis, cough
Budesonide (Rhinocort AQ) : ADRs
pharyngitis, epistaxis, cough
Flunisolide (Nasalide) : ADRs
after taste, nasal burning
Fluticasone (Flonase or Veramyst) : ADRs
HA, epistaxis
Mometasone furoate (Nasonex) : ADRs
HA, viral infection, epistaxis, cough
Ciclesonide (Omnaris): ADRs
HA, epistaxis
Oxymetazoline (Afrin): MOA
intranasal
Alpha-adrenergic agonist –> nasal arteriole vasoconstriction
Oxymetazoline (Afrin): how is it most effective?
Most effect in combo w intranasal corticosteroids
Oxymetazoline (Afrin): Adverse Effects
Rhinitis medicamentosa (rebound nasal congestion) w prolonged use (>3 days)- take for no more than 72 hrs
Ophthalmic agents: Agents and Indications
For ophthalmic Sxs of AR
- Vasoconstrictor- naphazoline (clear-eyes) OTC
- Antihistamine- Ketotifen (Zaditor) OTC
- NSAID- Ketorolac (Acular)
- Corticosteroid- Loteprednol (Alrex)
Ophthalmic agents: ADRs
Ophthalmic irritation, mydriasis- dilation of pupil, photophobia
Ophthalmic agents: considerations prior to administration
Remove contacts prior to use
Leukotriene Receptor Antagonists (LRAs): Comparability to other agents
Not 1st line- similar/ less effective vs 1st line, higher cost