Researchers testing a low-cost antidepressant on long COVID patients report the drug reduced crushing fatigue and improved quality of life. The randomized clinical trial enrolled 399 adults and found that fluvoxamine, a selective serotonin reuptake inhibitor (SSRI) approved for treating depression and obsessive-compulsive disorder, significantly outperformed placebo in alleviating fatigue.
Long COVID fatigue ranks among the most debilitating symptoms affecting millions of people worldwide. Unlike typical tiredness, the exhaustion persists for months or years after initial infection, often preventing sufferers from working or performing basic daily tasks. Currently, no FDA-approved treatments exist specifically for post-COVID fatigue, leaving clinicians and patients with limited options.
Fluvoxamine operates by increasing serotonin levels in the brain. The mechanism behind its effectiveness against long COVID fatigue remains under investigation, though researchers suspect it may involve reducing inflammation, improving mitochondrial function, or correcting neurological abnormalities associated with the condition.
The trial's scope and rigorous design strengthen its findings. By comparing fluvoxamine directly against placebo in nearly 400 participants, researchers controlled for psychological effects that could skew results. Participants measured fatigue improvements objectively, and quality-of-life measures confirmed functional gains beyond symptom reduction alone.
Cost represents a major advantage. Fluvoxamine carries a low price tag compared with newer drugs, making it accessible globally. This matters particularly in lower-income countries disproportionately affected by long COVID but lacking resources for expensive treatments.
However, limitations exist. The trial enrolled a relatively specific population that may not represent all long COVID patients. Individual responses to SSRIs vary considerably. Some people experience side effects like nausea or headaches. The study duration and whether improvements persist long-term require clarification.