Categorical variables are also known as qualitative (or discrete) variables. These categorical variables can be further classified as being nominal, dichotomous or ordinal variables. Each of these types of categorical variable (i.e., nominal, dichotomous and ordinal) has what are known as categories or levels. These categories or levels are the descriptions that you give a variable that help to explain how variables should be measured, manipulated and/or controlled.
BetimolÂ® (timolol ophthalmic solution), 0.25% and 0.5%, is a non-selective beta-adrenergic antagonist for ophthalmic use. The chemical name of the active ingredient is (S)-1-[(1,1-dimethylethyl)amino]-3-[(4-(4-morpholinyl)-1,2,5-thiadiazol-3-yl]oxy]-2-propanol. Timolol hemihydrate is the levo isomer.
Thalidomide (/Î¸ÉËlÉªdÉmaÉªd/ ; from phthalimido-glutarimide, currently sold as Immunoprin, Talidex, Talizer, or Thalomid) is an immunomodulatory drug and the prototype of the thalidomide class of drugs.oday, thalidomide is sold by Celgene, mainly as a treatment of certain cancers (multiple myeloma) and of a complication of leprosy. Thalidomide was first marketed in 1957 in West Germany under the trade-name Contergan. The German drug company Chemie Gruenenthal grÃ¼nenthal developed and sold the. drug