Drinking large amounts of coffee is not recommended for the elderly, as it will increase the risk of gastrointestinal discomfort, and may also lead to rapid heartbeat and affect sleep. 1. Gastrointestinal discomfort: Older women have weaker metabolism, and drinking large amounts of coffee will stimulate gastric peristalsis and gastric acid secretion, which may lead to gastrointestinal discomfort such as diarrhea and acid reflux. 2. Rapid heartbeat: the caffeine in coffee will make the heart beat faster, which may lead to arrhythmia and shortness of breath. 3. Sleep: Caffeine can make people excited, thus affecting sleep and even causing insomnia. Elderly people are not recommended to drink a lot of coffee, if there are uncomfortable symptoms after eating coffee need to be timely offline to avoid adverse consequences.