You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["Brand", "UnapprovedDrug", "Drug", "DrugGroup"].

Please return the output as a JSON object of the format: {"Brand" : ["Aspirin", ...], "DrugGroup": ["Salicyclate", ...], "Drug": ["Phenobarbital", ...], "UnapprovedDrug": ["Heroin", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

Urinary acidifying agents These agents (ammonium chloride, sodium acid phosphate, etc.) increase the concentration of the ionized species of the amphetamine molecule, thereby increasing urinary excretion. Both groups of agents lower blood levels and efficacy of amphetamines. Adrenergic blockers Adrenergic blockers are inhibited by amphetamines. Antidepressants, tricyclic Amphetamines may enhance the activity of tricyclic antidepressants or sympathomimetic agents; d-amphetamine with desipramine or protriptyline and possibly other tricyclics cause striking and sustained increases in the concentration of d-amphetamine in the brain; cardiovascular effects can be potentiated. MAO inhibitors MAOI antidepressants, as well as a metabolite of furazolidone, slow amphetamine metabolism. This slowing potentiates amphetamines, increasing their effect on the release of norepinephrine and other monoamines from adrenergic nerve endings; this can cause headaches and other signs of hypertensive crisis. A variety of toxic neurological effects and malignant hyperpyrexia can occur, sometimes with fatal results. Antihistamines: Amphetamines may counteract the sedative effect of antihistamines. Antihypertensives: Amphetamines may antagonize the hypotensive effects of antihypertensives. Chlorpromazine: Chlorpromazine blocks dopamine and norepinephrine receptors, thus inhibiting the central stimulant effects of amphetamines and can be used to treat amphetamine poisoning. Ethosuximide: Amphetamines may delay intestinal absorption of ethosuximide. Haloperidol: Haloperidol blocks dopamine receptors, thus inhibiting the central stimulant effects of amphetamines. Lithium carbonate: The anorectic and stimulatory effects of amphetamines may be inhibited by lithium carbonate. Meperidine: Amphetamines potentiate the analgesic effect of meperidine. Methenamine therapy Urinary excretion of amphetamines is increased, and efficacy is reduced by acidifying agents used in methenamine therapy. Norepinephrine: Amphetamines enhance the adrenergic effect of norepinephrine. Phenobarbital: Amphetamines may delay intestinal absorption of phenobarbital; co-administration of phenobarbital may produce a synergistic anticonvulsant action. Phenytoin: Amphetamines may delay intestinal absorption of phenytoin; co-administration of phenytoin may produce a synergistic anticonvulsant action. Propoxyphene: In cases of propoxyphene overdosage, amphetamine CNS stimulation is potentiated and fatal convulsions can occur. Veratrum alkaloids: Amphetamines inhibit the hypotensive effect of veratrum alkaloids. Drug/Laboratory Test Interactions: Amphetamines can cause a significant elevation in plasma corticosteroid levels. This increase is greatest in the evening. Amphetamines may interfere with urinary steroid determinations.
{"Brand": [], "Drug": ["Norepinephrine", "amphetamine", "ammonium chloride", "phenobarbital", "desipramine", "Haloperidol", "Propoxyphene", "Meperidine", "Methenamine", "Lithium carbonate", "Ethosuximide", "sodium acid phosphate", "phenytoin", "propoxyphene", "tricyclic antidepressants", "meperidine", "Chlorpromazine", "ethosuximide", "lithium carbonate", "protriptyline", "Phenobarbital", "Phenytoin", "norepinephrine", "d-amphetamine", "furazolidone", "antihypertensives", "methenamine"], "DrugGroup": ["Adrenergic blockers", "amphetamine", "tricyclic", "tricyclics", "Antihistamines", "Antidepressants", "Antihypertensives", "antihistamines", "sympathomimetic agents", "MAOI antidepressants", "veratrum alkaloids", "amphetamines", "MAO inhibitors", "Amphetamines", "Veratrum alkaloids"], "UnapprovedDrug": []}