Antidepressants are among the most commonly prescribed medicines in many countries. Millions of people take them to help manage depression, anxiety, and related mental health conditions.
For many patients, these medications can provide important relief from distressing symptoms and help them regain stability during difficult periods of life. However, a new review of research is raising questions about whether these medicines continue to provide the same benefits when used for many years.
The review was conducted by researchers from the University of Adelaide and The University of Queensland and was published in the Australian Journal of General Practice.
The researchers examined evidence on the long-term use of antidepressants and concluded that the benefits of staying on the medications for extended periods may be less certain than many people believe.
Depression is a common condition that affects mood, energy, sleep, concentration, and daily functioning. It can range from mild to severe and often requires treatment. Antidepressants have become a standard treatment option, particularly for moderate and severe depression. Many people take these medicines for months or even years after their symptoms improve.
According to the researchers, much of the evidence supporting long-term antidepressant treatment comes from studies known as relapse prevention trials. In these studies, one group of patients continues taking antidepressants while another group stops taking them. Researchers then compare how many people experience a return of symptoms.
Associate Professor Mark Horowitz from the University of Adelaide argues that there may be a significant problem with this approach. He explained that people who stop antidepressants suddenly or rapidly often experience withdrawal symptoms.
These symptoms can include anxiety, low mood, sleep problems, irritability, and other emotional difficulties. Because these symptoms can closely resemble depression, researchers may mistakenly classify withdrawal effects as a relapse of the original illness.
The review suggests that some of the apparent benefits of long-term antidepressant treatment may actually reflect the suppression of withdrawal symptoms rather than genuine prevention of depression returning. If this is true, current estimates of the value of long-term treatment could be overstated.
The researchers also examined evidence regarding side effects associated with long-term use. They found growing evidence linking extended antidepressant use to sexual problems, emotional blunting, cognitive difficulties, weight gain, and an increased risk of certain physical health issues among older adults.
These effects may not occur in every patient, but they can significantly affect quality of life for some individuals.
Another concern involves withdrawal symptoms. While many people can stop antidepressants without major difficulties, others experience symptoms that last for months or, in some cases, even years. The review notes that withdrawal effects may become more likely the longer a person remains on the medication.
In Australia, antidepressant use has become increasingly common. Nearly one in seven Australians now takes an antidepressant, and about one-third of users remain on the medication for more than a year. Most prescriptions are written by general practitioners, who often manage mental health care in community settings.
The researchers are calling for regular treatment reviews, suggesting that antidepressant therapy should be reassessed at least every six months. They believe patients should be fully informed about both the potential benefits and risks of long-term use so that treatment decisions can be made together with healthcare professionals.
The review also encourages greater use of psychological therapies and other non-drug approaches. Treatments such as cognitive behavioral therapy and other forms of counseling may provide lasting benefits without some of the risks associated with long-term medication use.
The authors emphasize that patients should not stop taking antidepressants on their own. Sudden discontinuation can increase the risk of withdrawal symptoms. Instead, any decision to reduce or stop medication should be discussed with a healthcare professional and carried out gradually when appropriate.
The findings are important because they challenge assumptions that have shaped treatment practices for many years. However, the review is not a clinical trial and does not prove that long-term antidepressants are ineffective. Rather, it highlights weaknesses in existing research and identifies areas where more high-quality studies are needed.
Overall, the review presents a thoughtful and important contribution to the ongoing debate about antidepressant treatment. Its main strength is drawing attention to the difficulty of separating withdrawal symptoms from true relapse.
However, the evidence remains incomplete, and many patients continue to benefit from antidepressants. Future research will need to provide clearer answers about who benefits most from long-term treatment, who may be harmed, and how best to support people who wish to stop these medications.
If you care about mental health, please read studies about 6 foods you can eat to improve mental health, and B vitamins could help prevent depression and anxiety.
For more health information, please see recent studies about how dairy foods may influence depression risk, and results showing Omega-3 fats may help reduce depression.
Source: University of Adelaide and The University of Queensland.
