People with amyotrophic lateral sclerosis who are unable to eat may try liquid and semi-liquid diets, using warm liquids, eating little by little. If they cannot consume a liquid diet, they may need to resort to nasogastric feeding. A gastric tube is used for feeding, through which high-nutrition, high-protein, and high-calorie diets can be provided to sustain and extend the life of those with the condition. Avoid overeating and engage in appropriate exercise, paying attention to the functions of the respiratory and digestive systems. If there is excessive saliva, a small amount of antihistamine medication can be administered. If there is an excess of phlegm, nebulized inhalation and expectorant medications might be provided. If feeding through a gastric tube is also limited, intravenous nutritional support can be given.