Myths vs facts: Progesteron and Müdigkeit

**Myths vs. Facts: Progesterone and Fatigue** **Fact:** Progesterone has a well-documented sedative effect. It binds to GABA-A receptors in the brain, acting similarly to benzodiazepines, which explains the fatigue commonly experienced in the second half of the menstrual cycle or during hormone therapy. This is a robust physiological effect. **Myth:** Fatigue from progesterone always indicates 'overdose' or 'intolerance.' – False. Some degree of tiredness is normal and even expected, especially with oral intake (due to the sedative metabolite allopregnanolone). Only extreme, persistent drowsiness warrants medical evaluation. **Myth:** Progesterone fatigue is a sign of progesterone deficiency. – False. Fatigue typically occurs when progesterone levels are adequate or high. Deficiency (e.g., in the luteal phase) may actually cause insomnia or restlessness. **Fact:** The fatigue is dose-dependent and can be mitigated by timing (taking it at bedtime) or switching to bioidentical progesterone via vaginal/transdermal routes. Synthetic progestins (e.g., in birth control) can also cause fatigue, but their profile varies. **Conclusion:** Progesterone-induced fatigue is real, not a myth. It is physiological but varies individually. If bothersome, consult a doctor to adjust dose or route.