Exam 1 Material Flashcards
tears
coat the conjunctiva and cornea
contains nutrients, enzymes, and immunoglobulins to support and protect the cornea
POAG glaucoma
usually gradual until visual field loss occurs
obstructed trabecular meshwork
drainage canal blocked
PACG
connected with shape of the eye
medical emergency
significant pain
quickly decrease IOP
pressure pushes iris against cornea, blocking trabecular meshwork
iris and lens stick together
B receptor antagonists for glaucoma MOA
block the beta-2 adrenoceptor on the ciliary body
B receptor antagonists for glaucoma pharm action
reduce aqueous production by the ciliary body (decrease inflow)
not much effect on outflow
Nonspecific B-blocking agents for glaucoma
timolol
levobunolol
relatively B1-selective agent glaucoma
betaxolol
nonspecific blocker with intrinsic sympathomimetic activity for glaucoma
caretolol
B receptor antagonists for glaucoma side effects
ocular
-sting and burning, decreased corneal sensitivity, diplopia, blurred or cloudy vision, decreased night vision, and ptosis
systemic
-cardiac: bradycardia and hypotension
-respiratory: bronchospasm in asthmatics
headache, insomnia, taste perversion, depression, impotence
a2 agonists for glaucoma MOA
bind to a2 rec on the ciliary body
binds to the uveosclera
a2 agonists for glaucoma pharm effect
decreases rate of aqueous humor production (decrease inflow)
some increase in uveoscleral outflow
neuroprotective
a2 agonists for glaucoma
apraclonidine
brimonidine
apraclonidine side effects
ocular-burning and stinging, blurred vision, foreign body sensation, ocular pruritus
systemic-hypotension, oral dryness, allergic rxns
brimonidine side effects
ocular-foreign body sensation and ocular pruritus
systemic-oral dryness, dizziness, fatigue, somnolence, reduction in blood pressure and pulse
more systemic SE
carbonic anhydrase inhibitors for glaucoma MOA
prevents the conversion of CO2 and water to carbonic acid
reduces availability of sodium and bicarbonate for secretion
carbonic anhydrase inhibitors for glaucoma pharm effect
decreases ciliary body aqueous humor secretion (decrease inflow)
oral carbonic anhydrase inhibitors for glaucoma
acetazolamide
methazolamide
ophthalmic carbonic anhydrase inhibitors for glaucoma
dorzolamide
brinzolamide
carbonic anhydrase inhibitors for glaucoma side effects
ocular: burning or stinging, hypersensitivity, headache, bitter, sour, or unusual taste, dry eye, foreign body sensation, and blurred vision
oral: altered taste and smell, dry mouth, excessive thirst, increased urination, systemic acidosis, and depression
M3 agonists for glaucoma
carbachol
pilocarpine
AChE inhibitor for glaucoma
echothiophate
M3 agonists for glaucoma MOA
agonist at M3 receptor on sphincter muscle and trabecular meshwork
M3 agonists for glaucoma pharm effect
contraction of the sphincter muscle and trabecular meshwork increase outflow
opens meshwork
M3 agonists for glaucoma side effects
ocular: burning and stinging, painful ciliary muscle spasm->headache, blurred vision, myopia, poor vision in dim light, increased visibility of floaters and lacrimation
systemic: diarrhea, salivation, sweating, and rhinorrhea
AChE inhibitor for glaucoma MOA
irreversible acetylcholinesterase inhibitor
increase of acetylcholine
AChE inhibitor for glaucoma pharm effect
contraction of the sphincter muscle and trabecular meshwork (increase outflow)
AChE inhibitor for glaucoma side effects
ocular: burning and stinging, blurred vision, eye pain, lacrimation, headache, brow-ache, twitching of eyelids
systemic: diarrhea, salivation, sweating, and rhinorrhea
prostaglandin agonists for glaucoma
bimatoprost
latanoprost
latanoprostene bunod
travaprost
tafluprost
prostaglandin agonists for glaucoma MOA
agonist at the PFG2a receptor causing relaxation of the ciliary muscle
prostaglandin agonists for glaucoma pharm effect
reduces IOP by increasing uveoscleral and trabecular outflow of aqueous humor (increase outflow)
does NOT affect aqueous humor production
may be more effective in hazel/brown colored eyes than blue/green
prostaglandin agonists for glaucoma side effects
blurred vision, burning and stinging, eye pain lid edema and ocular hyperemia
increased brown pigmentation of iris and eyelids
hypertrichosis and hyperpigmentation of lashes
hair growth in other areas
few systemic side effects
rho kinase inhibitor for glaucoma
netarsudil
rho kinase inhibitor for glaucoma pharm effect
increases outflow
rho kinase inhibitor for glaucoma side effects
conjunctival hyperemia-vasodilation
corneal vericillate; did not change vision
instillation site pain
conjunctival hemorrhage
combo products for glaucoma
timolol and dorzolamide
timolol and brimonidine
brinzolamide and brimonidine
histamine
released from storage granules as a result of the interaction of antigen with IgE antibodies on the mast cell surface
immediate hypersensitivity and allergic rxns
effects of histamine release
itching and stimulates secretion from nasal mucosa
contracts smooth muscles-bronchi and gut
relaxes other smooth muscles-small blood vessels
stimulus of gastric acid secretion
edema and stimulation of sensory nerve endings
ophthalmic antihistamines for allergic conjunctivitis MOA
H1 inverse agonists
mast cell stabilization
H1 inverse agonists
reduce constitutive activity of receptor and compete with histamine binding to the receptor
mast cell stabilization
reduces release of mast cell mediators during an allergic response
anti-inflammatory prop, reducing cytokine secretion, decreased adhesion molecule expression, and inhibition of eosinophil infiltration
ophthalmic antihistamines for allergic conjunctivitis pharm action
reduce the symptoms of an allergic rxn such as edema, itch, inflammation, and watery eyes
ophthalmic antihistamines for allergic conjunctivitis
alcaftadine
azelastine
bepotastine
cetirizine
epinastine
ketotifen
olopatadine
alcaftadine
H1 antagonist and mast cell stabilization
H4 receptor antagonism
v little anticholinergic activity
little penetration into CNS
low incidence of side effects
azelastine
H1 antagonist and mast cell stabilization
also as nasal spray for allergic rhinitis
bepotastine
H1 antagonist and mast cell stabilizer
cetirizine
H1 antagonist
has minimal anticholinergic effects
negligible CNS penetration, but still causes drowsiness
epinastine
H1 antagonist and mast cell stabilization
H2 antagonist, which may reduce eyelid edema
ketotifen
H1 antagonist and mast cell stabilizer
olopatadine
H1 antagonist and mast cell stabilization
also as nasal spray
ophthalmic decongestants for allergic conjunctivitis MOA
adrenergic (alpha) receptor agonist
ophthalmic decongestants for allergic conjunctivitis pharm action
vasoconstrictors for local application to the nasal mucous membrane or the eye
reduces redness
a2 agonists for ophthalmic decongestants
naphazoline
oxymetazoline
tetrahydrozoline
brimonidine tartrate
ophthalmic antihistamine/decongestant combo for allergic conjunctivitis
naphazoline/pheniramine
ophthalmic mast cell stabilizers for allergic conjunctivitis pharm effect
prevents release of inflammatory and constricting mediators like histamine, leukotrienes, cytokines, and degradative enzymes from activated mast cells
prevents thee allergic event rather than alleviating symptoms
ophthalmic mast cell stabilizers for allergic conjunctivitis
cromolyn sodium
nedocromil
ophthalmic mast cell stabilizers for allergic conjunctivitis side effects
cromolyn-burning and stinging, dryness and styes
nedocromil-headache, burning/stinging, photophobia
glucocorticoids for allergic conjunctivitis MOA
immunosuppression to reduce inflammation
glucocorticoids for allergic conjunctivitis side effects
cataracts
glucocorticoids for allergic conjunctivitis products
fluorometholone
hydrocortisone
loteprednol
prednisolone Na+ phosphate
rimexolone
dry eye
aka keratoconjunctivitis sicca
onset is unpredictable but may correlate with environment (meds)
may present with or without redness of the eyes
risk factors for dry eye
increasing age and females
cyclosporine
calcineurin inhibitor class immunosuppressant
helps increase tear production
calcineurin inhibitor MOA
inhibits production of IL-2 needed for T cell proliferation (which reduces inflammation of eye)
calcineurin inhibitors for dry eye side effects
ocular burning, instillation site pain, conjunctival hyperemia, discharge, epiphora, eye pain, foreign body sensation, pruritus, stinging, or visual disturbances
loteprednol
anti-inflammatory to treat dry eye
corticosteroid
LFA-1 antagonist for dry eye MOA
lymphoma function-associated antigen 1 (LFA-1) antagonist
cell surface protein found on leukocytes
blocks interaction with intercellular adhesion molecule-1 (ICAM-1)
may inhibit T cell adhesion to ICAM-1 and secretion of inflammatory cytokines
lifitegrast
LFA-1 antagonist for dry eye
lifitegrast side effects
application site irritation, reduced visual acuity
intranasal varenicline
nicotinic acetylcholine receptor agonist
-increase production of basal tear film
typically for smoking cessation, but can also used for dry eye
intranasal varenicline side effects
acquired night blindness, blurred vision, retinal vascular disorder, subcapsular cataract, transient blindness, visual disturbance
cerumenolytics mechanisms
hydrate, soften, liquify, or disintegrate cerumen
three types of cerumenolytics
water based
oil based
nonwater, nonoil based
water based cerumenolytics
cerumenex
colace-docusate sodium
hydrogen peroxide
oil based cerumenolytics
olive oil
nonwater, nonoil based cerumenolytics
debrox-carbamide peroxide
prepared in diff solvent-glycerol
docusate Na
water-based cerumenolytics
surfactant which increases water entry and emulsifies
has both hydrophilic and lipophilic parts
carbamide peroxide
debrox
nonwater, nonoil based cerumenolytics
releases H2O2, which generates effervescing O2
effervescence breaks up ear wax
tooth decay causes
bacteria forms plaque on teeth and gums
bacteria also converts sugars into acids which erode enamel leading to cavities
acid drinks can also erode enamel
tooth decay prevention
fluoride based toothpastes or gels
non-fluoride toothpastes
mouth rinses
cavity treatments
fluoride based toothpastes or gels
enamel is made up of hydroxyapatite (vulnerable to acid erosion)
fluoride ions toothpastes convert hydroxyapatite into fluorapaptite which is more resistant to acid erosion
fluoride ions in toothpastes or gels
form fluorapatite from hydroxyapatite
enhance mineral deposition (mineralization)
but too much fluoride can cause enamel fluorosis
non-fluoride toothpastes
abrasives/pH modifiers/remineralizers
sodium bicarbonate
nanohydroxyapatite
calcium sodium phosphosilicate (CSPS)
amorphous calcium phosphate (ACP)
sodium bicarbonate
abrasive and mouth pH elevating agent
nanohydroxyapatite (10% nHA)
small crystals which bond to hydroxyapatite
calcium sodium phosphosilicate (CSPS)
bioactive glass that reacts with oral fluids to deposit crystalline hydroxycarbonate apatite (HCA)
amorphous calcium phosphate (ACP)
reactive salt mixture that releases Ca and PO4 ions to remineralize enamel upon contact with salvia
mouth rinses
for plaque/gingivitis/bad breath/tooth decay/pain management
chlorhexidine gluconate
cetylpyridinium chloride
fluoride
NaHCO3
carbamide peroxide
thymol/eucalyptol/methyl salicylate/menthol
benzocaine
chlorhexidine gluconate
mouth rinses
bisbiguanide salt
bind to cell wall and disrupt its integrity
cetylpyridinium chloride
mouth rinse
pyridinium salt
fluoride mouth rinse
promote remineralization and prevent caries
NaHCO3 mouth rinse
increase saliva pH
decrease growth of acidic bacteria
carbamide peroxide mouth rinse
for canker cores
benzocaine mouth rinse
anesthetic agent
thymol/eucalyptol/methyl salicylate/menthol mouth rinse
listerine
teeth whitening
whiteners remove stains
range from abrasives to H2O2 bleaching agents
carbamide peroxides and hydrogen peroxides
alpha2 agonists chem
aryl imidazolines
decrease inflow and increase outflow
clonidine
apraclonidine
brimonidine tartrate
SAR for alpha2 agonists
X=CH2; alpha1 receptor agonists
X=NH2; alpha2 receptor agonists
beta antagonists chem
aryloxypropanolamine
decrease inflow
timolol, betaxolol, levobunolol, caretolol