NEW ORLEANS – Patients with new-onset schizophrenia often ask psychiatrist Stephen R. Marder, MD, whether they’ll need to be on medications forever to treat the disorder. Now, he said, research is showing that the answer isn’t always yes.
In many cases, “it’s an open question” whether lifelong medical treatment is needed, said Dr. Marder, a professor at the Semel Institute for Neuroscience and Human Behavior at the University of California, Los Angeles, who spoke in a presentation about schizophrenia treatment at the annual meeting of the American Psychiatric Association.
Dr. Stephen Marder
According to Dr. Marder, research about relapses suggests that there may be a subpopulation of patients who can come off antipsychotics and remain in remission or partial remission. “The problem,” he said, “is that group is very hard to identify.”
Indeed, he highlighted a 2017 study that suggested The study noted choosing the best candidates isn’t simple, as “we do not have clinical measures or biomarkers that allow us to identify them prospectively. Because relapses and delays in the treatment of psychosis have been associated with poorer outcomes, there may be risk associated with withholding or discontinuing medication.”
There are more complications. There’s some evidence that antipsychotic drugs reduce brain volume, Dr. Marder said. But on the other hand, each psychotic episode can itself be harmful. “There is clear evidence that for each psychotic episode, they can take longer to improve, and they need higher doses.”
What to do? “My suggestion for most patients is to keep them on a relatively mild dose of an antipsychotic,” Dr. Marder said, “then to have a gradual decrease in the dose. I’ve done it in many patients.”
Which drug is best over the long term – oral or long-acting injectable antipsychotics? “It’s a hard question to answer because if you rely on randomized clinical trials – with patients who signed consent and are willing to be in a study like that – the subjects are sometimes not the ones who benefit the most from the long-acting drugs. So for many of the randomized clinical trials, the data was incomplete, and it was hard to make the case.”
But if you combine meta-analyses and cohort studies, as a 2021 study did, “you come up with a really clear answer: LAIs [long-acting injectables] are superior. They lead to a superior outcomes when it comes to rehospitalization and psychotic relapse,” Dr. Marder said.
That study reported that “LAIs were more beneficial than oral antipsychotics in 60 [18.3%] of 328 comparisons, not different in 252 [76.8%] comparisons, and less beneficial in 16 [4.9%] comparisons.”
More schizophrenia treatment pearls
People with schizophrenia – including those who aren’t on medication – face three times the risk of developing type 2 diabetes as the general population, “maybe because there’s a shared genetic risk for both disorders,” Dr. Marder said. “Those of you who have a lot of schizophrenia patients, I suspect you’re monitoring if they’re treating their type 2 diabetes and their obesity.”
Which antipsychotics are the best option for these patients? He highlighted a 2020 systematic review and meta-analysis that offers helpful insight into connections between 18 drugs and factors like weight and cholesterol.
Dr. Marder added that “if somebody has an elevation in their triglycerides or [hemoglobin] A1c in one single fasting blood glucose during the first 6 weeks of treatment, even if they haven’t been rated, it suggests that they’re developing insulin resistance.” At that point, he said, it’s a good idea to reconsider the medication choice.
Also, he said, keep in mind that “there’s substantial evidence that metformin is the appropriate treatment for patients who begin to demonstrate insulin resistance. It also works sometimes for weight loss.”
Exercise in people with schizophrenia can pay important dividends. A 2016 meta-analysis suggests that “not only does exercise for people with schizophrenia lead to better cardiovascular health, it’s good for the brain and improves cognitive functioning,” Dr. Marder said. “It’s not easy sometimes to get people with schizophrenia to exercise, but it’s many times worth the effort.”
Dr. Marder reported consulting for Boehringer Ingelheim, Lundbeck, Otsuka, Roche, Neurocrine, Sunovion, Newron, Merck, and Biogen; editor of UptoDate and Schizophrenia Bulletin Open; and research support from Boehringer Ingelheim.