It's important to remember, though, that only a trained medical worker can make a correct diagnosis after carefully looking at the person's symptoms and medical background. Narcolepsy and sadness can both make you sleep too much, but they are caused by and show themselves in different ways:

In people with narcolepsy vs depression, falling asleep during the day can happen suddenly and without warning, even if they get enough sleep at night. Cataplexy is a rapid loss of muscle tone that can happen to people with narcolepsy. It is usually caused by strong feelings. People who have narcolepsy may also have trouble sleeping at night, waking up often, or having trouble staying asleep.

Feelings of sadness, helplessness, and a lack of interest or pleasure in activities are all signs of depression. People who are depressed often have trouble sleeping, but some people may also have hypersomnia, which means they sleep too much. Depressed people often say they are tired and don't have any energy, which can make them sleepy during the day. It is important to remember that these conditions can happen at the same time and that their signs may be similar. To find the real reasons, a full medical exam might be needed, which could include a complete medical history, a physical exam, and even sleep studies or mental tests. In the event that your patient is feeling too sleepy or has other troubling symptoms, they should immediately see a medical professional to get a full evaluation and correct diagnosis.