Abstract: The invention relates to the use of compounds of the general formula (I) wherein R1 represents a hydrogen atom or a C1-10 alkyl, C3-7 cycloalkyl, C3-7 cycloalkyl-(C1-4)alkyl, C3-6 alkenyl, C3-10 alkynyl, phenyl or phenyl-C1-3 alkyl group; and one of the groups represented by R2, R3 and R4 is a hydrogen atom or a C1-6 alkyl, C3-7cycloalkyl, C2-6 alkenyl or phenyl-C1-3 alkyl group and each of the other two groups, which may be the same or different, represents a hydrogen atom or a C1-6 alkyl group; and physiologically acceptable salts and solvates thereof, for the relief of nausea and vomiting and/or the promotion of gastric emptying and for the manufacture of a medicament for this purpose.

Abstract: The invention relates to the co-administration in human or veterinary medicine of 1,2,3,9-tetrahydro-9-methyl-3-[(2-methyl-1H-imidazol-1-yl)methyl]-4H-carbazol-4-one or a physiologically acceptable salt or solvate thereof and dexamethasone or a physiologically acceptable salt or ester thereof. The two active ingredients, which may be administered separately either simultaneously or sequentially, or may be combined in a single pharmaceutical preparation, are useful in the relief and/or prevention of nausea and vomiting.

Abstract: The invention relates to the use of compounds which act as antagonists of 5-hydroxytryptamine (5-HT) at 5-HT3 receptors for the treatment of depression.

Abstract: The invention relates to the use of compounds of the general formula (I) ##STR1## wherein R.sup.1 represents a hydrogen atom or a C.sub.1-10 alkyl, C.sub.3-7 cycloalkyl, C.sub.3-7 cycloalkyl-(C.sub.1-4) alkyl, C.sub.3-6 alkenyl, C.sub.3-10 alkynyl, phenyl or phenyl-C.sub.1-3 alkyl group; and one of the groups represented byR.sup.2, R.sup.3 and R.sup.4 is a hydrogen atom or a C.sub.1-6 alkyl, C.sub.3-7 cycloalkyl, C.sub.2-6 alkenyl or phenyl-C.sub.1-3 alkyl group and each of the other two groups, which may be the same or different, represents a hydrogen atom or a C.sub.1-6 alkyl group;and physiologically acceptable salts and solvates thereof, for the relief of nausea and vomiting and/or the promotion of gastric emptying and for the manufacture of a medicament for this purpose. Promotion of gastric emptying may be for the relief of gastro-intestinal disorders associated with gastric stasis or may be of advantage in radiological examination procedures.