<prompt> Which of the following drugs DOES NOT cause Sicca Syndrome?AtropineNicotineOlanzapineClonidine  <response>: Sicca syndrome is charecterised by Xerostomia subjective feeling of mouth dryness and xerophthalmia subjective feeling of eye dryness are the key symptoms in the diagnosis of Sjogren syndrome, occurring in more than 95 of patients. Drugs known to cause sicca syndrome Anticholinergic drugs atropine, scopolamine Sympathomimetic drugs ephedrine Benzodiazepines Selective serotonin reuptake inhibitors Tricyclic antidepressants Phenothiazines Antihistamines Nicotine Opioids a1 antagonists terazosin and prazosin a2 agonists clonidine b blockers atenolol, propranolol Diuretics Ref: Primary Sjogren syndrome ; BMJ 2012;344:e3821. 