The Holmes-Adie syndrome consists of unilateral or bilateral tonic pupils with near light dissociation and tendon areflexia. It is associated with autonomic disturbances aVecting sudomotor and vasomotor function. Five such patients are reported on who also had a troublesome chronic dry cough, which was of unknown aetiology and was resistant to a range of treatments. The cough may be related to involvement of aVerent or eVerent pathways in the vagus. Chronic cough may be an accompaniment in the HolmesAdie syndrome, like other forms of autonomic dysfunction. (J Neurol Neurosurg Psychiatry 1998;65:583-586)