Which of the following glaucoma drugs must be kept in the refrigerator after it has been opened?

dorzolamide (Trusopt®)
timolol (Timoptic®)
latanoprost (Xalatan®)
brinzolamide (Azopt®)


latanoprost (Xalatan®)

Rationale: Xalatan® (latanoprost) is a glaucoma drug that must be kept in the refrigerator after opening. The other answer choices are all drugs used to treat glaucoma, but do not require refrigeration after opening.

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One of the types of valves used to shut down a sprinkler system is the OS&Y (____) valve.

A. orange screw and yoke B. outside sail and yoke C. one size and yoke D. outside screw and yoke

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Fill in the blank(s) with the appropriate word(s).

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Fill in the blank(s) with the appropriate word(s).

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