depression

Looking for links between Parkinson’s and bipolar disorder

A new systematic review and meta-analysis ask whether bipolar disorder is associated with developing Parkinson’s disease. Although the authors conclude that there is a link, it is a tough question to unpick. Bipolar disorder (BD), which people once called manic depression, tends to begin around 20 years of age. Characterized by cyclic…

How do antidepressants affect gut bacteria?

Newly published research in rodents and ongoing research in humans examines the effects of psychiatric drugs, including antidepressants, on the composition of gut bacteria. More and more studies are supporting the role of the gut microbiota in psychiatric conditions. Anxiety and depression are only some of the mental health conditions that researchers have linked to…

Dopamine and serotonin: Brain chemicals explained

Dopamine and serotonin are chemical messengers, or neurotransmitters, that help regulate many bodily functions. They have roles in sleep and memory, as well as metabolism and emotional well-being. People sometimes refer to dopamine and serotonin as the “happy hormones” due to the roles they play in regulating mood and emotion. They are…

Adults who mix cannabis with opioids for pain report higher anxiety, depression

A researcher from the University of Houston has found that adults who take prescription opioids for severe pain are more likely to have increased anxiety, depression and substance abuse issues if they also use marijuana. “Given the fact that cannabis potentially has analgesic properties, some people are turning to it…