Sick Note for Insomnia and Sleep Disorders: When You're Too Exhausted to Work
Severe sleep deprivation impairs you as much as alcohol intoxication. Here's when you need documentation for insomnia-related work absences.
## Sleep Deprivation and Work Safety
Research shows that being awake for **24 hours** impairs cognitive function equivalent to a blood alcohol level of **0.10%** — well above the legal driving limit. Severe insomnia isn't just being "tired" — it's a medical condition that can make working dangerous.
### When Insomnia Prevents Safe Working
Severe sleep deprivation is particularly dangerous for:
- **Drivers** (commercial, delivery, transit) — reaction time severely impaired
- **Healthcare workers** — patient safety at risk
- **Machine operators** — injury risk
- **Construction workers** — fall risk, impaired judgment
- **Any safety-sensitive role** — cognitive impairment
Even for office workers, severe insomnia causes:
- Inability to concentrate or make decisions
- Memory impairment
- Emotional dysregulation
- Physical symptoms (headaches, nausea, dizziness)
### Types of Sleep Disorders
| Condition | Impact on Work |
|-----------|---------------|
| Acute insomnia (stress-related) | 1-7 days of impairment |
| Chronic insomnia | Ongoing, may need accommodation |
| Sleep apnea (untreated) | Daytime drowsiness, safety risk |
| Shift work sleep disorder | Circadian disruption |
| Medication-induced insomnia | Side effect management |
### When You Need a Sick Note
Documentation may be needed when:
- You've had little to no sleep for 24+ hours and cannot safely work
- Chronic insomnia is causing repeated absences
- You work in a safety-sensitive role and cannot safely perform duties
- You need workplace accommodation (schedule changes, no night shifts)
- Your employer requires documentation for absence
### Getting Documentation
MedLetter provides documentation for sleep-related work absences:
1. Describe your sleep pattern, duration of the issue, and how it affects your ability to work
2. Note if you work in a safety-sensitive role
3. A licensed physician reviews your submission
4. Receive documentation when clinically appropriate
### Workplace Accommodation for Chronic Sleep Disorders
If you have an ongoing sleep disorder, you may be entitled to accommodation:
- Modified shift schedules (no rotating shifts)
- Later start times
- Work-from-home options
- Reduced driving requirements
- Temporary modified duties during treatment
MedLetter also provides [workplace accommodation letters](/get-started/workplace_accommodation) for chronic conditions.
### When to Seek In-Person Care
See a physician in-person if:
- You suspect sleep apnea (snoring, gasping, witnessed breathing stops)
- Insomnia has lasted more than 3 months
- You're using sleep medication daily
- You have thoughts of self-harm due to exhaustion
- You need a sleep study referral
**Important:** MedLetter provides documentation for work absences only. If you need treatment for a sleep disorder, please consult your family physician.
[Get Your Documentation →](/get-started/sick_note)