Abstract: Compositions useful in the treatment of disturbances of appetite, disturbances of mood, or both, associated with premenstrual syndrome, as well as methods of use therefor. The compositions include serotoninergic drugs, such as d-fenfluramine and fluoxetine.

Abstract: Blood pressure is increased in a patient having a condition which effects rapid fixing of neurons in the sympathetic nervous system and low blood pressure by administering a mixture of (a) (1) phenylalanine or (2) a mixture of phenylalanine and tyrosine and (b) a drug which increases noradrenergic neurotransmission in the sympathetic nervous system.

Abstract: Tyrosine or a tyrosine precursor is administered concomitantly with an indirect-acting sympathomimetic amine drug to increase the level of norepinephrine that can be released in sympathetic neuron synapses.

Abstract: Choline or a choline precursor is administered to a patient together with an amino acid which is a precursor to a neurotransmitter in order to give a synergistic result for the two components.

Abstract: Blood pressure is increased in a patient having a condition which effects rapid firing of neurons in the sympathetic nervous system and low blood pressure by administering tyrosine to the patient. The tyrosine composition can be administered alone or concomitantly with a drug which increases noradrenergic neurotransmission in the sympathetic nervous system.

Abstract: Choline or a choline precursor is administered to a patient together with an amino acid which is a precursor to a neurotransmitter in order to give a synergistic result for the two components.

Abstract: A composition comprising tryptophan and melatonin with or without an insulin-releasing carbohydrate or melatonin and an insulin-releasing carbohydrate is administered to an animal in order to increase the levels or release of brain serotonin.

Abstract: Tyrosine or a tyrosine precursor is administered concomitantly with an indirect-acting sympathomimetic amine drug to increase the level of norepinephrine that can be released in sympathetic neuron synapses.

Abstract: D-fenfluramine is administered to a human patient having seasonal depression or other forms of bipolar depression in order to alleviate or cure the depression.

Abstract: Choline or a natural or synthetic compound that dissociates to form choline is administered to a patient concomitantly with a drug in order to potentiate the effect of the drug by increasing acetylcholine levels in the brain or other tissues, and/or to suppress, or block the development of, unwanted side effects of the drug, by increasing acetylcholine levels in the brain or other tissues.

Abstract: Choline or a natural or synthetic compound that dissociates to form choline is administered to a patient who has or is about to participate in major exercise in order to decrease fatigue by increasing acetylcholine levels in the brain or other tissues. The term "fatigue" as used herein means the subjective feeling of tiredness as well as the fatigue of muscles and the actual decrease of performance.

Abstract: Choline or a choline precursor is administered to a patient together with an amino acid which is a precursor to a neurotransmitter in order to give a synergistic result for the two components.

Abstract: Cytidyl diphosphocholine is administered to a patient alone to increase brain acetylcholine levels or concomitantly with a drug in order to potentiate the effect of the drug by increasing acetylcholine levels in the brain or other tissues, and/or to suppress, or block the development of, unwanted side effects of the drug, by increasing acetylcholine levels in the brain or other tissues.

Abstract: Tyrosine or a tyrosine precursor is administered concomitantly with an indirect-acting sympathomimetic amine drug to increase the level of norepinephrine that can be released in sympathetic neuron synapses.

Abstract: Cytidyl diphosphocholine is administered to a patient alone to increase brain acetylcholine levels or concomitantly with a drug in order to potentiate the effect of the drug by increasing acetylcholine levels in the brain or other tissues, and/or to suppress, or block the development of, unwanted side effects of the drug, by increasing acetylcholine levels in the brain or other tissues.

Abstract: A composition comprising tyrosine and a carbohydrate is administered in amount to increase brain tyrosine levels.

Abstract: The risk of ventricular fibrillation in animals is reduced by administering tyrosine, a tyrosine precursor, threonine or mixtures thereof, either alone or in combination with a substance which is known to reduce the risk of ventricular fibrillation. A novel composition is provided comprising a unit dosage form of tyrosine, a precursor for tyrosine, threonine or mixtures thereof and a substance which is known to reduce the risk of ventricular fibrillation.

Abstract: Choline or a natural or synthetic compound that dissociates to form choline is administered to a patient concomitantly with a drug in order to potentiate the effect of the drug by increasing acetylcholine levels in the brain or other tissues, and/or to suppress, or block the development of, unwanted side effects of the drug, by increasing acetylcholine levels in the brain or other tissues.

Abstract: Compositions containing controlled amounts of d,l-fenfluramine are administered to block the intermittent carbohydrate cravings without necessarily suppressing other food intakes.

Abstract: The level of a catecholamine in neuronal synapses is increased in order to improve vigor by administering a neutral amino acid composition to a human wherein an increased brain level of a catecholamine is effected when the composition contains increased amounts of tyrosine and/or phenylalanine. Increased or decreased brain levels of serotonin are obtained when the amino acid composition contains increased or decreased amounts of tryptophan.The neutral amino acid composition can be administered alone or concomitantly with a drug which increases or decreases catecholaminergic neurotransmission.