Key takeaways
- In South Africa, vortioxetine is approved as Brintellix to treat major depressive disorder in adults and to lower the chance of it coming back. SAHPRA-approved Brintellix information.
- In an eight-week trial, adults with depression scored better on thinking tests with vortioxetine than with placebo. Healthy people looking for sharper focus were not studied. Randomised cognition trial.
- In people who already had sexual problems on an SSRI, sexual function improved more after switching to vortioxetine than after switching to escitalopram. Randomised switching trial.
- It can still cause sexual side effects, and nausea is common. A different way of acting on serotonin does not mean no side effects. South African prescribing information.
Your mood has lifted. You are sleeping again and getting through the week. But you read the same paragraph three times, you lose the thread halfway through a conversation, and the antidepressant that helped has also flattened your sex life. Being told to give it time does not feel like an answer.
Those two leftovers, the fog and the sexual side effects, are why many people go looking for vortioxetine. Our catalogue lists it under the Trintellix name, while the South African approved information cited here calls it Brintellix: same active ingredient, different brand name. What matters more than the name is what the trials actually tested, and whether that matches your problem.
Can vortioxetine help the cognitive symptoms of depression?
One trial found better scores on thinking tests, in people with depression, over eight weeks. That is not the same as a brain boost.
The trial enrolled 602 adults with recurrent, moderate to severe depression. After eight weeks, the vortioxetine group did better than the placebo group on a combined score for processing speed and memory. The researchers checked whether this was simply the mood improving, and their analysis suggested part of the gain was separate from mood. It could not show how the medicine produced it. Cognition trial.
Two cautions. The developers, Lundbeck and Takeda, sponsored the study, which does not make it wrong but is a good reason to look at its design and at whether others have repeated it. And a better result on a processing-speed test does not promise that you will follow a meeting more easily at work.
Poor concentration can have more than one cause. Our thyroid treatment article looks at a different situation where symptoms persist despite treatment. It is not a hint that your thyroid is to blame, or a reason to add another medicine.
Are sexual side effects less likely than with an SSRI?
For people who already had sexual problems on an SSRI, switching to vortioxetine helped more than switching to escitalopram. That is a narrower finding than it sounds.
The trial took 447 adults whose depression was well controlled but whose sex lives had suffered on an SSRI, and moved them to either vortioxetine or escitalopram. Over eight weeks, sexual function improved more in the vortioxetine group, and depression stayed under control in both. Switching trial.
Look at who took part. These people already had a problem on treatment. The study does not tell you what to expect if you are starting an antidepressant for the first time, and vortioxetine can cause sexual side effects of its own.
| Your main concern | What the evidence can help you ask |
|---|---|
| Concentration remains poor | Were similar symptoms measured, and in people with my diagnosis? |
| Sexual function changed on treatment | Is a supervised switch reasonable, and how will mood be monitored? |
| Nausea or other effects are disruptive | Is the overall benefit still worthwhile? |
What makes vortioxetine different, and what does not change?
It acts on serotonin in more than one way. More mechanisms do not make it a better antidepressant.
Vortioxetine blocks serotonin reuptake, as an SSRI does, and also acts directly on several serotonin receptors. You will see it described as “multimodal”. That word describes its pharmacology. It is not evidence that it will suit you better than an SSRI. South African prescribing information.
The choice still comes down to ordinary things: how you responded to past treatment, which side effects you can live with, what else you take, and what you most want to improve. If staying awake is the real complaint, that is a different problem, and our modafinil and armodafinil comparison explains why wakefulness and depressive brain fog are not the same target.
What should be checked before a switch?
Other medicines that affect serotonin, any past episodes of unusually high mood, and how you feel in the first weeks.
Nausea is common. The more serious risk comes from combining vortioxetine with MAO inhibitors or other medicines that act on serotonin. Tell the prescriber about every medicine and supplement you take, and about any past spells of unusually elevated mood or needing far less sleep than normal. New or worsening thoughts of suicide need urgent help, especially early in treatment or after any change to it. South African warnings.
Do and don’t
Do: Name the one symptom you most want to fix, and agree how you and your prescriber will track mood, concentration and sexual function.
Don’t: Stop, overlap or swap antidepressants without a plan from your prescriber, or read “fewer side effects” as “none”.
