Special Dietary Consideration for 24 Hour Urine Special Dietary Consideration for 24 Hour Urine Collection for 5-HIAA Collection for 5-HIAA Patient should avoid food high in indoles: avocado, banana, Patient should avoid food high in indoles: avocado, banana, tomato, plum, walnut, pineapple, and eggplant. tomato, plum, walnut, pineapple, and eggplant. Drugs which can interfere with testing due to physiologic Drugs which can interfere with testing due to physiologic response: Acetaminophen, Alpha and Beta Blockers, response: Acetaminophen, Alpha and Beta Blockers, Atenolol, Bromocriptine, Bronchodilators, Clonidine, Digoxin, Atenolol, Bromocriptine, Bronchodilators, Clonidine, Digoxin, Isoniazid, L-Dopa, Labetelol, Methyldopa, Monoamine Isoniazid, L-Dopa, Labetelol, Methyldopa, Monoamine Oxidase Inhibitors, Nitroglycerin, Sympathomimetic Amines, Oxidase Inhibitors, Nitroglycerin, Sympathomimetic Amines, Phenobarbital, Phenothiazines, Phentolamine, Reserprine, Phenobarbital, Phenothiazines, Phentolamine, Reserprine, Salicylates, Tricyclic Antidepressants. Salicylates, Tricyclic Antidepressants. Special Dietary Consideration for 24 Hour Urine Special Dietary Consideration for 24 Hour Urine Collection for 5-HIAA Collection for 5-HIAA Patient should avoid food high in indoles: avocado, banana, Patient should avoid food high in indoles: avocado, banana, tomato, plum, walnut, pineapple, and eggplant. tomato, plum, walnut, pineapple, and eggplant. Drugs which can interfere with testing due to physiologic Drugs which can interfere with testing due to physiologic response: Acetaminophen, Alpha and Beta Blockers, response: Acetaminophen, Alpha and Beta Blockers, Atenolol, Bromocriptine, Bronchodilators, Clonidine, Digoxin, Atenolol, Bromocriptine, Bronchodilators, Clonidine, Digoxin, Isoniazid, L-Dopa, Labetelol, Methyldopa, Monoamine Isoniazid, L-Dopa, Labetelol, Methyldopa, Monoamine Oxidase Inhibitors, Nitroglycerin, Sympathomimetic Amines, Oxidase Inhibitors, Nitroglycerin, Sympathomimetic Amines, Phenobarbital, Phenothiazines, Phentolamine, Reserprine, Phenobarbital, Phenothiazines, Phentolamine, Reserprine, Salicylates, Tricyclic Antidepressants. Salicylates, Tricyclic Antidepressants. Special Dietary Consideration for 24 Hour Urine Special Dietary Consideration for 24 Hour Urine Collection for 5-HIAA Collection for 5-HIAA Patient should avoid food high in indoles: avocado, banana, Patient should avoid food high in indoles: avocado, banana, tomato, plum, walnut, pineapple, and eggplant. tomato, plum, walnut, pineapple, and eggplant. Drugs which can interfere with testing due to physiologic Drugs which can interfere with testing due to physiologic response: Acetaminophen, Alpha and Beta Blockers, response: Acetaminophen, Alpha and Beta Blockers, Atenolol, Bromocriptine, Bronchodilators, Clonidine, Digoxin, Atenolol, Bromocriptine, Bronchodilators, Clonidine, Digoxin, Isoniazid, L-Dopa, Labetelol, Methyldopa, Monoamine Isoniazid, L-Dopa, Labetelol, Methyldopa, Monoamine Oxidase Inhibitors, Nitroglycerin, Sympathomimetic Amines, Oxidase Inhibitors, Nitroglycerin, Sympathomimetic Amines, Phenobarbital, Phenothiazines, Phentolamine, Reserprine, Phenobarbital, Phenothiazines, Phentolamine, Reserprine, Salicylates, Tricyclic Antidepressants. Salicylates, Tricyclic Antidepressants. Special Dietary Consideration for 24 Hour Urine Special Dietary Consideration for 24 Hour Urine Collection for 5-HIAA Collection for 5-HIAA Patient should avoid food high in indoles: avocado, banana, Patient should avoid food high in indoles: avocado, banana, tomato, plum, walnut, pineapple, and eggplant. tomato, plum, walnut, pineapple, and eggplant. Drugs which can interfere with testing due to physiologic Drugs which can interfere with testing due to physiologic response: Acetaminophen, Alpha and Beta Blockers, response: Acetaminophen, Alpha and Beta Blockers, Atenolol, Bromocriptine, Bronchodilators, Clonidine, Digoxin, Atenolol, Bromocriptine, Bronchodilators, Clonidine, Digoxin, Isoniazid, L-Dopa, Labetelol, Methyldopa, Monoamine Isoniazid, L-Dopa, Labetelol, Methyldopa, Monoamine Oxidase Inhibitors, Nitroglycerin, Sympathomimetic Amines, Oxidase Inhibitors, Nitroglycerin, Sympathomimetic Amines, Phenobarbital, Phenothiazines, Phentolamine, Reserprine, Phenobarbital, Phenothiazines, Phentolamine, Reserprine, Salicylates, Tricyclic Antidepressants. Salicylates, Tricyclic Antidepressants. Special Dietary Consideration for 24 Hour Urine Special Dietary Consideration for 24 Hour Urine Collection for 5-HIAA Collection for 5-HIAA Patient should avoid food high in indoles: avocado, banana, Patient should avoid food high in indoles: avocado, banana, tomato, plum, walnut, pineapple, and eggplant. tomato, plum, walnut, pineapple, and eggplant. Drugs which can interfere with testing due to physiologic Drugs which can interfere with testing due to physiologic response: Acetaminophen, Alpha and Beta Blockers, response: Acetaminophen, Alpha and Beta Blockers, Atenolol, Bromocriptine, Bronchodilators, Clonidine, Digoxin, Atenolol, Bromocriptine, Bronchodilators, Clonidine, Digoxin, Isoniazid, L-Dopa, Labetelol, Methyldopa, Monoamine Isoniazid, L-Dopa, Labetelol, Methyldopa, Monoamine Oxidase Inhibitors, Nitroglycerin, Sympathomimetic Amines, Oxidase Inhibitors, Nitroglycerin, Sympathomimetic Amines, Phenobarbital, Phenothiazines, Phentolamine, Reserprine, Phenobarbital, Phenothiazines, Phentolamine, Reserprine, Salicylates, Tricyclic Antidepressants. Salicylates, Tricyclic Antidepressants. .