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Read the Course Slides On Disclosures Treatment and Management of Ocular Paid consultant for: Inflammation and Allergy Maculogix: Honoraria-Advisory Board Sun Pharmaceuticals: Honoraria: Advisory Board Blair Lonsberry, MS OD, MEd., FAAO Pacific University College of Optometry Portland, OR [email protected] Types of Allergic Eye Disease Allergic Conjunctivitis Acute allergic conditions Seasonal Allergic Conjunctivitis (Hay Fever) - SAC Perennial Allergic Conjunctivitis - PAC Chronic allergic conditions Vernal Conjunctivitis - VKC Atopic Conjunctivitis - AKC Giant Papillary Conjunctivitis - GPC SAC and PAC are most commonly encountered by ODs Seasonal Allergic Conjunctivitis (SAC) Perennial Allergic Conjunctivitis (PAC) Occurs during peak allergy seasons: (spring & fall) Primarily caused by outdoor allergens – pollen Milder than SAC (ragweed, mountain cedar), grasses Occurs year round Produces hallmark signs and symptoms such as: Primarily an indoor disease itching, -Environmental controls can be effective redness, Can become more severe with higher pollen counts chemosis, tearing and lid swelling Response to Histamine Mast Cell Cascade Vasodilation Erythema Increased vascular permeability Edema Neural stimulation Itching Reflex loop increasing vascular permeability Hallmark Clinical Signs Treatment of Ocular Allergy Medications: Topical OTC drops Oral antihistamines (prescription and OTC) Hyperemia Chemosis Topical NSAID drops Topical antihistamines Topical mast cell stabilizers Topical steroid drops Topical dual-action drugs (antihistamine/mast cell stabilizers) Lid edema Tearing Ocular Allergy Medication Options Vasoconstrictors Tetrahydrazoline HCI Levocabastine LIVOSTIN* VISINE*, MURINE* Plus Emedastine EMADINE® solution Naphazoline HCI Alpha-adrenergic agonists and are commonly used topically NAPHCON® eye drops, VASOCON* Loteprednol ALREX* for the relief of conjunctival redness Phenylephrine HCI Rimexolone VEXOL** suspension PREFRIN* E.g. Phenylephrine, Naphazoline, Tetrahydrozoline, Oxymetazoline HCI Cromolyn Oxymetazoline VISINE L.R.* CROLOM*, MAXICROM™ solution Lodoxamide well known and widely used ® Naphazoline/Antazoline ALOMIDE solution limited duration (<2hours) limits their value when VASOCON*-A Nedocromil Naphazoline/Pheniramine ALOCRIL*, TILAVIST* compared with the newer anti-allergy drops. NAPHCON-A® eye drops Pemirolast ALAMAST* do not interfere with the allergic reaction and do not Ketorolac relieve itching ACULAR* Azelastine OPTIVAR*, LASTIN* Ketotifen ZADITOR*, ALAWAY*, Suprofen ZYRTEC, CLARITIN may also result in rebound hyperemia PROFENAL® solution Epinastine ELESTAT* Diclofenac E.g. Visine, Naphcon, AK-Con, Murine Olopatadine PATANOL® PATADAY, PAZEO VOLTAREN* Bepotastine BEPREVE * Trademarks are the property of their respective owners **Vexol is a trademark of N.V. Organon Alcaftadine LASTACAFT Antihistamines Antihistamines Newer H1 have longer duration (4-6 hrs) and are Have traditionally been first line in the treatment of better tolerated than previous generation ocular allergy. Levocabastine (Livostin) bid-qid in patients >12 Emedastine (Emadine) bid-qid in patients >3 H1-receptor competitive antagonists FDA approved: Bepotastine (Bepreve) First generation have good safety record Twice day dosing for ocular itching in patients 2 or older Topical agents provide faster relief of ocular limited duration and potency (pheniramine and antazoline). symptoms compared to oral agents Available in OTC drops. orals also have increased side-effects including dry mouth, dry eye, blurred vision, etc Mast Cell Stabilizers Mast Cell Stabilizers Inhibit mast cell degranulation by interrupting Cromolyn was first available 1-2 drops and dosing is 4-6 times daily, normal chain of intracellular signals resulting with a loading period of 7 days from the crosslinking and activation by allergen. has only partial inhibitory action and limited efficacy. Nedocromil is more potent Several available for use in the eye: BID dosing. cromolyn sodium 4% (Crolom) Lodoxamide nedocromil sodium 2% (Alocril) 2500 X more potent than cromolyn!!! 1-2 drops tid-qid for up to 3 months in patients 3+ Lodoxamide (Alomide) indicated for VKC and allergic conjunctivitis. Pemirolast (Alamast) Pemirolast approved for QID dosing and proven to be effective in mast cell stabilization. Dual-Action Tx: NSAID’s Trend is dual mechanism molecules inhibit histamine release from mast cells Mechanism of action via inhibition of the COX enzyme completely inhibits histamine binding to H1 receptors. blocks the synthesis of prostaglandins (in particular PGD2) which is known to incite significant and immediate allergic Provides relief by immediate histamine receptor symptomatology. antagonism also stabilizing future mast cell degranulation. Ketorolac (Acular) proved to be effective and well Olopatadine: tolerated at QID dosing for 2 weeks and then bid-tid as (Patanol [0.1%], Pataday [0.2%], Pazeo [0.7%]): Patanol and Pataday needed for itching are now OTC Not as effective as olopatadine (qd or bid). Bepotastine: Bepreve bid dosing Alcaftadine: Lastacaft qd dosing Diclofenac sodium was also shown to have some effects in controlling S&S of seasonal and VKC. Oral Antihistamines Oral Allergy Medications Oral medications may be indicated for ocular findings Oral antihistamines (pills and liquids) ease symptoms such as: associated with additional systemic symptoms such as swelling, runny nose, runny nose itchy or watery eyes, and hives (urticaria). Studies have shown poor efficacy in the relief of ocular Some oral antihistamines may cause dry mouth and drowsiness. Older antihistamines such as diphenhydramine (Benadryl), findings in comparison to topical treatment chlorpheniramine (Chlor-Trimeton) and clemastine (Tavist) are more likely to cause drowsiness and slow reaction time. these sedating antihistamines shouldn't be taken when driving or doing Options Include both OTC and Rx other potentially dangerous activities. 1st Generation Antihistamines - 1st Gen Oral Antihistamines Benadryl Classified According to Sedation Levels: Beneficial for temporary treatment of acute case of contact dermatitis Mildly Sedating Topical formulas are available. Brompheniramine (Generic) Chlorpheniramine (ChlorTrimeton) Moderately Sedating Dosage: 50 mg TID – QID adults Clemastine (Tavist) 25 mg TID-QID kids Strongly Sedating Diphenhydramine (Benadryl) Promethazine (Phenergan) Onset: within minutes with peak at 1 hour and 6-12 hour duration of action Most appropriate optometric use is for controlling allergic symptoms during sleep due to heavy powers of sedation Pregnancy category B Use at night can result in “Drug Hangover” effect 1st Generation Oral Antihistamines nd Contraindications 2 Generation Oral Antihistamines Relatively contraindicated in patients with peptic ulcer disease, prostate Minimal cholinergic blocking and minimal sedation effects hypertrophy, bladder obstructions, or narrow angles due to the anti- 2nd generation antihistamines are less lipid soluble and cannot cholinergic properties penetrate the blood brain barrier as effectively Avoid mixing with: Same side effects are still possible but usually much less than 1st Anti-cholinergics and adrenergic agonists gen drugs CNS depressants (barbiturates; benzodiazepines such as Valium and Xanax) Include: Fexofenadine (Allegra) Elderly and those with liver dysfunction have higher risks for side effects Loratadine (Claritin) Nursing mothers? Desloratadine (Clarinex) Follow pregnancy categories closely and work with the patients Cetirizine (Zyrtec) OB/GYN Levocetirizine (Xyzal) 2nd Generation Antihistamines Additional Use of Antihistamines No major contraindications besides hypersensitivity Essential Myokymia (Eyelid Twitching) Antacids may block absorption and erythromycin may increase bioavailability Relatively mild contractions of the orbicularis muscle Usually unilateral If taken in doses exceeding the recommended values, CNS side effects will likely occur Idiopathic; linked to: All may potentiate psychotropic medications to some degree Fatigue, stress, anxiety and caffeine Findings are benign and not progressive Always use caution and consider dose adjustment in patients with kidney or renal failure Frequently resolve in a few hours to weeks Antihistamines have been clinically shown to cause relief of mild symptoms If symptoms are not controlled with one 2nd generation antihistamine, often success can be found with another Occurs by prolonging the refractory time of the orbicularis Intranasal Medications Studies do confirm that ocular symptoms are relieved somewhat by nasal medications (corticosteroids) Steroids These studies show that nasal medications do give better relief of ocular symptoms than oral medications but not as beneficial as topical ophthalmic drugs Intra-nasal sprays plus ophthalmic drops give the more benefit and the fewer side effects than oral antihistamines Contraindications of Steroid Use Three instances in which we would NOT consider using steroids by themselves, although it may be appropriate to use a steroid-antibiotic combination: 1. Avoid steroids when treating an acute bacterial or fungal infection, mainly because steroids do not possess antimicrobial properties. 2. Steroids are contraindicated when there is a significant corneal epithelial defect. 3. Steroids are contraindicated when you're unsure of the diagnosis. Specific Actions on Inflammation Corticosteroids
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