Methods for using (2-imidazolin-2-ylamino) tetrahydroquinoxalines

A medication composition comprising:

• an amount of a compound effective to provide a desired therapeutic effect in a mammal to which said amount of said compound is administered, said desired therapeutic effect being a decrease in the rate of fluid transport in the gastrointestinal tract of said mammal, said compound being selected from the group consisting of those having the formula ##STR15## pharmaceutically acceptable acid addition salts thereof and mixtures thereof, wherein R.sub.1 and R.sub.4 are independently selected from the group consisting of H and alkyl radicals having 1 to 4 carbon atoms, R.sub.2 and R.sub.3 are independently selected from the group consisting of H, oxo, and alkyl radicals having 1 to 4 carbon atoms, the 2-imidazolin-2-ylamino group may be in any of the 5-, 6-, 7- or 8-positions of the quinoxaline nucleus, and R.sub.5, R.sub.6 and R.sub.7 each is located in one of the remaining 5-, 6-, 7- or 8-positions of the quinoxaline nucleus and is selected from the group consisting of Cl, Br, H and alkyl radicals having 1 to 3 carbon atoms;
• and
• a carrier component combined with said compound in an amount effective to facilitate the administration of said amount of said compound to said mammal.