It has been reported that some patients have been misdiagnosed with ADHD, when in fact the correct diagnosis in their specific case was Depression.
Depression is a mental health disorder that causes a persistent negative thoughts and feelings. It causes the patient issues in functioning normally in day to day life and can lead to suicidal thoughts. Symptoms include feelings of sadness, tearfulness, emptiness and hopelessness, angry outbursts, irritability and frustration, loss of interest and pleasure in activities, sleep disturbances, tiredness, reduced appetite, slowed thinking, feelings of worthlessness, trouble concentrating, and thoughts of death. Conditions that depression can be misdiagnosed as include anaemia, anxiety, ADHD, chronic fatigue syndrome, bipolar disorder, diabetes, cyclothymic disorder, hypothyroidism, fibromyalgia, posttraumatic stress disorder, hypercalcemia, vitamin D deficiency, and premenstrual dysphoric disorder.