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Preservative-free eye drops are found in single vials. However, single unit-dose artificial tears without preservatives are more expensive than bottled artificial tears with preservatives. [9] Some patients confuse over the counter drops that contain tetrahydrozoline (i.e. Visine®), a vasoconstrictor, with artificial tears. [11]
A single 1 to 2 mg dose of estrone in oil solution by intramuscular injection has a duration of about 2 or 3 days. [ 45 ] [ 67 ] [ 68 ] As an aqueous suspension by intramuscular injection , estrone was used at a dose of 0.1 to 0.5 mg 2 to 3 times per week, or at a dose of 0.1 to 2 mg once a week or in divided doses. [ 69 ]
Estradiol (E2) is a medication and naturally occurring steroid hormone. [11] [12] [13] It is an estrogen and is used mainly in menopausal hormone therapy and to treat low sex hormone levels in women.