Abstract: The present invention relates to a class of compounds represented by the formula ##STR1## or a pharmaceutically acceptable salt thereof useful in the treatment of diseases or disorders mediated by platelet activating factor (PAF).

Abstract: The imidazopyridines compounds of the present invention are serotonergic 5-HT.sub.3 antagonists. As such they are useful for the treatment of humans and animals wherein antagonism of 5-HT.sub.3 receptors is beneficial. Therapy is indicated for, but not limited to, the treatment of anxiety, psychoses, depression (especially depression accompanied by anxiety), cognitive disorders, substance abuse dependence and withdrawal, gastrointestinal motility disturbancies (including esophageal reflux, dyspepsia, gastric stasis, irritable bowel syndrome), emesis caused by chemotherapeutic agents, and visceral pain. Additionally, the compounds of the present invention may find utility as enhancers of nasal absorption of bioactive compounds.

Abstract: The imidazopyridines containing meso-azacycle side chains as described herein find utility as antagonists of the serotonin 5-HT.sub.3 receptor. As such they are useful for the treatment of humans and animals wherein antagonism of 5-HT.sub.3 receptors is beneficial. Therapy is indicated for, but not limited to, the treatment of anxiety, psychoses, depression (especially depression accompanied by anxiety), cognitive disorders, substance abuse dependence and/or withdrawal, gastrointestinal motility disturbancies (including esophageal reflux, dyspepsia, irritable bowel syndrome), emesis caused by chemotherapeutic agents, and visceral pain. Additionally, the compounds of the present invention may find utility as enhancers of nasal absorption of bioactive compounds.

Abstract: The imidazopyridines containing meso-azacycle side chains as described herein find utility as antagonists of the serotonin 5-HT.sub.3 receptor. As such they are useful for the treatment of humans and animals wherein antagonism of 5-HT.sub.3 receptors is beneficial. Therapy is indicated for, but not limited to, the treatment of anxiety, psychoses, depression (especially depression accompanied by anxiety), cognitive disorders, substance abuse dependence and/or withdrawal, gastrointestinal motility disturbancies (including esophageal reflux, dyspepsia, irritable bowel syndrome), emesis caused by chemotherapeutic agents, and visceral pain. Additionally, the compounds of the present invention may find utility as enhancers of nasal absorption of bioactive compounds.

Abstract: The present invention relates to a class of compounds represented by the formula ##STR1## or a pharmaceutically acceptable salt thereof useful in the treatment of diseases or disorders mediated by platelet activating factor (PAF).

Abstract: An azatetracycle compound of the general formula ##STR1## wherein D is a tetracycle of the structure ##STR2## wherein Ar is an aromatic moiety and B is either NH or O.

Abstract: The present invention relates to compounds of the formula: ##STR1## and the pharmaceutically acceptable salts thereof, wherein Z can be: ##STR2## wherein R.sup.3 is alkyl having 1 to 6 carbon atoms and, when n is greater than 1, each R.sup.3 can be the same or different; and n is an integer from 1 to 3;R.sup.1 and R.sup.2 can each independently be hydrogen, straight or branched chain alkyl, or cycloalkyl having 3 to 8 carbon atoms which can optionally be substituted at one or more positions by alkyl of 1 to 6 carbon atoms; X is oxygen, sulfur, NR.sup.4, wherein R.sup.4 is hydrogen or alkyl having 1 to 4 carbon atoms, C.dbd.O, CHOH, or CH.sub.2 ; Y is hydrogen, alkoxy, halogen, alkyl, or hydroxy; and m is an integer from 0 to 3. The compounds are antagonists of platlet-activating factor (PAF).

Abstract: The imidazopyridines containing meso-azacycle side chains as described herein find utility as antagonists of the serotonin 5-HT.sub.3 receptor. As such they are useful for the treatment of humans and animals wherein antagonism of 5-HT.sub.3 receptors is beneficial. Therapy is indicated for, but not limited to, the treatment of anxiety, psychoses, depression (especially depression accompanied by anxiety), cognitive disorders, substance abuse dependence and/or withdrawal, gastrointestinal motility disturbancies (including esophageal reflux, dyspepsia, irritable bowel syndrome), emesis caused by chemotherapeutic agents, and visceral pain. Additionally, the compounds of the present invention may find utility as enhancers of nasal absorption of bioactive compounds.

Abstract: The imidazopyridines containing meso-azacycle side chains as described herein find utility as antagonists of the serotonin 5-HT.sub.3 receptor. As such they are useful for the treatment of humans and animals wherein antagonism of 5-HT.sub.3 receptors is beneficial. Therapy is indicated for, but not limited to, the treatment of anxiety, psychoses, depression (especially depression accompanied by anxiety), cognitive disorders, substance abuse dependence and/or withdrawal, gastrointestinal motility disturbancies (including esophageal reflux, dyspepsia, irritable bowel syndrome), emesis caused by chemotherapeutic agents, and visceral pain. Additionally, the compounds of the present invention may find utility as enhancers of nasal absorption of bioactive compounds.

Abstract: An azatetracycle compound useful as 5 HT.sub.3 antagonists of the general formula ##STR1## wherein D is a tetracycle of the structure ##STR2## wherein Ar is an aromatic moiety and B is either NH or O.

Abstract: The imidazopyridines containing meso-azacycle side chains as described herein find utility as antagonists of the serotonin 5-HT.sub.3 receptor. As such they are useful for the treatment of humans and animals wherein antagonism of 5-HT.sub.3 receptors is benefical. Therapy is indicated for, but not limited to, the treatment of anxiety, psychoses, depression (especially depression accompanied by anxiety), cognitive disorders, substance abuse dependence and/or withdrawal, gastrointestinal motility disturbances (including esophageal reflux, dyspepsia, irritable bowel syndrome), emesis caused by chemotherapeutic agents, and visceral pain. Additionally, the compounds of the present invention may find utility as enhancers of nasal absorption of bioactive compounds.

Abstract: This invention relates to novel substituted imidazopyridine derivatives having the following formula ##STR1## or a pharmaceutically acceptable acid addition salt useful in the treatment of diseases or disorders mediated by platelet-activating factor. This invention relates to pharmaceutical compositions of such substituted imidazopyridines.

Abstract: This invention relates to novel 5-substituted [4,5-c]imidazopyridine derivatives useful in the treatment of diseases or disorders mediated by platelet-activating factor. This invention also relates to pharmaceutical compositions of such substituted imidazopyradines.