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Diphenhydramine is a first-generation antihistamine used to treat a number of conditions including allergic symptoms and itchiness , the common cold , insomnia , motion sickness , and extrapyramidal symptoms .
 common cold, insomnia, motion sickness, extrapyramidal symptoms
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 common cold, insomnia, motion sickness, extrapyramidal symptoms