EpistemisMorning fatigue of unexplained origin
Specialty: General.
Why it occurs
- Upper airway resistance syndrome (SRAVAS, a variant of OSAHS where there is no overt obstructive apnea but nocturnal ventilatory resistance fragments sleep, preventing the reparative phase)
- Depressive disorders with an insidious or atypical course (characterized by marked asthenia and anhedonia in the morning that improves slightly throughout the afternoon)
- Subacute onset adrenal insufficiency (where the physiological cortisol peak at 8:00 a.m. is attenuated or absent, preventing normal energetic awakening)
- Circadian rhythm disorders such as delayed sleep phase (common in people exposed to screens at night, which alters the secretion of natural melatone)
- Evening consumption of alcohol or long-acting sedatives whose active metabolites latently depress the cerebral cortex in the morning.
Initial workup
Nocturnal polysomnography with detailed reading of microawakenings and oximetry, determination of morning salivary cortisol (08:00 h) and total serum cortisol, complete blood count, general metabolic profile, and Epworth daytime sleepiness scale.
red flags
Sudden nocturnal awakening with a feeling of suffocation or chest tightness, intense morning headache accompanied by nausea and vomiting suggesting intracranial hypertension, syncope or severe orthostatic arterial hypotension when getting out of bed.
Standard management
- Hydrocortisone — 10 to 15 mg orally immediately upon awakening, only if adrenal insufficiency has been documented by the endocrinologist
- Melatone — 2 to 3 mg orally given early in the evening to help resynchronize the circadian rhythm of sleep
- Supervised progressive withdrawal of benzodiazepines or long-term sleep inducers.
Educational guidance for study. It is NOT a prescription recommendation. The actual choice depends on the cause, the patient, and current guidelines.
- Area
- General
- Listed causes
- 5
- Treatment options
- 3