(-)-Pseudoephedrine as a sympathomimetic drug
The present invention provides pharmaceutical compositions which include (−)-pseudoephedrine and a pharmaceutically acceptable carrier, wherein the (−)-pseudoephedrine is substantially-free of (+)-pseudoephedrine. In another embodiment, the present invention provides methods of relieving nasal and bronchial congestion and of inducing pupil dilation which include administering a pharmaceutically effective amount of (−)-pseudoephedrine to a mammal. The (−)-pseudoephedrine used in the present methods is substantially free of (+)-pseudoephedrine and also substantially free of side effects caused by administration of (+)-pseudoephedrine.
1 - 17 . (canceled)
18 . A pharmaceutical composition comprising an antihistamine and (−)-phenylephrine in a therapeutically acceptable dosage suitable for treating nasal and bronchial congestion and a pharmaceutically acceptable carrier, wherein said (−)-phenylephrine is substantially-free of (+)-phenylephrine; wherein said composition has fewer negative side effects than a composition comprising (+) phenylephrine or a racemic mixture of (−)-phenylephrine and (+)-phenylephrine.
19 . The pharmaceutical composition of claim 18 wherein said composition is substantially-free of a side effect related to administration of (+)-phenylephrine.
20 . The pharmaceutical composition of claim 19 wherein said side effect is a drug reaction.
21 . The pharmaceutical composition of claim 19 wherein said side effect is an interaction with an antihistamine.
22 . The pharmaceutical composition of claim 18 wherein said (−)-phenylephrine is not readily converted to (S)-methamphetamine.
23 . The pharmaceutical composition of claim 18 wherein said therapeutically acceptable dosage is an amount of (−)-phenylephrine is sufficient to activate an α-adrenergic receptor.
24 . The pharmaceutical composition of claim 18 wherein said therapeutically acceptable dosage is an amount of (−)-phenylephrine is sufficient to counteract the physiological effects of histamine.