The present invention relates to tetrahydronaphthyridine derivatives of
the general formula (I): 1
or of the general formula (I') 2
in which A and R.sup.1 are as defined within, and to processes for the
preparation of, intermediates used in the preparation of, compositions
containing and the uses of, including the treatment diseases mediated by
H3 ligands, in particular inflammatory, allergic and respiratory
diseases, disorders and conditions.