A person can appear intoxicated even when a breathalyser detects no alcohol due to a range of medical, physiological, environmental, or substance-related factors. Here are the most common reasons:
1. Medical Conditions
- Low blood sugar (hypoglycemia) – can cause confusion, shakiness, and slurred speech.
- Neurological disorders – such as stroke, seizures, migraines, or vertigo.
-Head injuries or concussions – may lead to disorientation or imbalance.
-Infections or high fever – can affect coordination and cognitive function.
2. Medications
Certain prescription or over-the-counter medications can impair judgment, coordination, and speech, including:
- Sedatives
- Antihistamines
- Anti-anxiety medications
- Strong painkillers
- These may cause “intoxicated-like” behavior without alcohol.
3. Drug Use (Non-Alcohol)
Breathalysers only detect alcohol, not other substances. Impairment can come from:
- Cannabis
- Methamphetamine
- Opioids
- Benzodiazepines
- Other illicit or prescription drugs
4. Fatigue or Sleep Deprivation
Extreme tiredness can mimic intoxication, affecting:
- Reaction time
- Speech
- Motor control
- Decision-making
5. Mental Health Factors
- Anxiety or panic attacks
- Severe stress
- Emotional shock
These can lead to confusion or unsteady behavior.
6. Environmental Factors
- Dehydration
- Heat exhaustion
- Lack of food
These may cause dizziness, weakness, or impaired coordination.