Abstract: Novel 2-piperidinylimidazopyridines of the formula: ##STR1## wherein R represents an alkoxyalkyl radical containing 4 to 6 carbon atoms; an optionally substituted benzyl radical or a tetrahydrofurfuryl radicalas well as the non-toxic, pharmaceutically acceptable acid addition salts thereof.The compounds of formula I are endowed with an interesting antihistaminic and antiallergic activity.

Abstract: Novel imidazopyridine derivatives of formula: ##STR1## wherein, R represents an alkoxyalky radical having 4-6 carbon atoms or a benzyl radical optionally substituted by a halogen atom, an alkyl or alkoxy radical having up to 3 carbon atoms,X represents hydrogen or an alkyl radical having up to 3 carbon atoms,n represents 0 or 1m represents an integer of from 2 to 5 inclusive,R.sub.1 and R.sub.2 may be the same or different and represent a saturated or unsaturated alkyl radical containing up to 4 carbon atoms or they, taken together with the adjacent nitrogen atom, may form a pyrrolidine, piperazine or homopiperazine ring which may be optionally substituted by an alkyl radical containing up to 3 carbon atoms, provided that when n is zero also m is zero and --N(R.sub.1)R.sub.2 represents the above defined piperazine or homopiperazine ring.The compounds (I) have an antihistaminic activity.

Abstract: 2-substituted 3-(2-ethoxyethyl)imidazo[4,5-b] pyridine derivatives of the formula ##STR1## wherein n is an integer of from 1 to 5 inclusiveR.sub.1 and R.sub.2 represent each a saturated or unsaturated alkyl radical containing from 1 to 4 carbon atoms or they form, together with the adjacent nitrogen atom an optionally substituted heterocyclic ring andthe corresponding non-toxic pharmaceutically acceptable acid addition salts.The compounds of formula (I) are endowed with antiallergic and antihistaminic activity.