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Figure 1.0 - Basic anatomical features of the human eye. Ophthalmic drug administration is the administration of a drug to the eyes, most typically as an eye drop formulation. Topical formulations are used to combat a multitude of diseased states of the eye. These states may include bacterial infections, eye injury, glaucoma, and dry eye. [1]
Tropicamide, sold under the brand name Mydriacyl among others, is a medication used to dilate the pupil and help with examination of the eye. [3] Specifically it is used to help examine the back of the eye. [4] It is applied as eye drops. [3] Effects occur within 40 minutes and last for up to a day. [3]
Cenegermin, sold under the brand name Oxervate, also known as recombinant human nerve growth factor, is a recombinant form of human nerve growth factor. [4] Cenegermin is a peripherally selective agonist of the tropomyosin receptor kinase A (TrkA) and low-affinity nerve growth factor receptor (p75NTR).
Bromfenac eye drops are generally well tolerated. Comparatively common side effects in clinical studies included abnormal sensations in eye (0.5% of people treated with bromfenac), mild to moderate erosion of the cornea (0.4%), eye pruritus (0.4%), eye pain (0.3%) and redness (0.3%).
Dorzolamide, sold under the brand name Trusopt among others, is a medication used to treat high pressure inside the eye, including in cases of glaucoma. [3] It is used as an eye drop. [3] Effects begin within three hours and last for at least eight hours. [3] It is also available as the combination dorzolamide/timolol. [3] [4]
Bimatoprost/timolol, sold under the brand name Ganfort, is a medication for the treatment of certain conditions involving high pressure in the eyes, specifically open angle glaucoma and ocular hypertension. [1] [3] It is available as eye drops. [1] [3] It was approved for medical use in the European Union in May 2006. [3]
In one study, 10 people were given two drops of 0.5 mg/mL of tetryzoline eye drops (0.025–0.05 mg) at 0 hrs, 4 hrs, 8 hrs, and 12 hrs. Within a 24-hour time window, since the last dose of tetryzoline, the blood serum concentration of tetryzoline in the test subjects was 0.068-0.380 ng /mL and the urine concentration was 13–210 ng/mL.
Serious side effects may include allergic reactions and heart failure. [3] Use is not recommended in those with asthma, a sulfonamide allergy, or a slow heart rate. [3] [7] Dorzolamide is a carbonic anhydrase inhibitor and timolol is a beta blocker. [3] Both work by decreasing the amount of aqueous humor made by the eye. [3]