Provided are 4-phenyl-pyridine compounds of the general formula (I), wherein the variables are as defined in the specification. Particularly preferred compounds are the compounds GA1-GA4 and GA6. GA1 is 4-(5-(2-(3,5-bis(trifluoromethyl)phenyl)-N,2-dimethylpropanamido)-4-(o-tolyl)pyridin-2-yl)-1-methyl-1-((phosphonooxy)methyl)piperazin-1-ium. The compounds are NK-1 receptor antagonists. The compounds may be useful in the treatment of emesis, bladder dysfunction, anxiety and depression.