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Hydroxyzine

Hydroxyzine is a first-generation histamine H1-receptor antagonist of the dephenylmethane and piperazine classes that exhibits sedative, anxiolytic, and antiemetic properties. It was first developed in 1955, and has since remained a rela...

Cyclopentamine

It has been widely discontinued due to the safety, effectiveness, and availability of a similar drug, propylhexedrine.

Chloramphenicol succinate

[A204065] Use of chloramphenicol succinate and chloramphenicol has decreased due to the risk of potentially fatal blood dyscrasias.

Etorphine

A narcotic analgesic morphinan used as a sedative in veterinary practice. In certain countries, etorphine is classified as a Schedule 1 drug and hence, in these countries, it can be used legally only by health professionals and for resea...

Potassium sulfate

Xenon Xe-129

Lung MRIs are challenging due to the low proton density of this tissue, as well as the presence of artifacts due to respiration and cardiovascular pulsation movement and air–tissue interfaces. … [Helium-3] (He-3) is the one most commonly used due to its strong signal and favorable safety profile, but its use in other applications has affected its availability.

Vanadium

Temafloxacin

It was first approved for use in the U.S. market in 1992, but was withdrawn shortly due to the reports of serious adverse reactions, such as allergic reactions and hemolyric anemia, resulting in three

Lutein

Lutein is an xanthophyll and one of 600 known naturally occurring carotenoids. Lutein is synthesized only by plants and like other xanthophylls is found in high quantities in green leafy vegetables such as spinach, kale and yellow carrot...

Captopril

Captopril is a potent, competitive inhibitor of angiotensin-converting enzyme (ACE), the enzyme responsible for the conversion of angiotensin I (ATI) to angiotensin II (ATII). ATII regulates blood pressure and is a key component of the r...