Positives

• Agomelatine may be relevant for patients whose Long COVID or ME/CFS includes insomnia, circadian rhythm disruption, low mood, or non-restorative sleep (PMC).
• Because sleep disruption can amplify pain, brain fog, dysautonomia, and fatigue, a circadian-focused medication may be worth discussing when sleep is a dominant problem (Psychiatry Online).

Negatives

• Agomelatine is not a direct treatment for PEM, immune dysfunction, MCAS, Lyme, or the core disease process of Long COVID or ME/CFS (Wikipedia).
• Patient discussions include variable sleep and mood response, and some patients experience headache, dizziness, nausea, daytime sleepiness, or paradoxical sleep worsening (Drugs.com).

Hurdles & Side Effects

• Liver-function monitoring is an important barrier, and it is not available or commonly used in every country (PMC).
• Patients already taking multiple medications or supplements that affect the liver should be especially cautious (PMC).