Alcohol and Drug Rules for Drivers in Italy
Italian drink-driving laws for the Patente B exam: legal BAC limits, zero-tolerance rules for new drivers, drug-driving penalties, and breathalyser procedures explained.
Alcohol and drug rules are among the most strictly enforced and frequently tested topics in the Patente B exam. Italy has tiered limits, zero-tolerance rules for certain drivers, and severe penalties including criminal prosecution for serious violations. Knowing the numbers precisely matters — the exam tests exact BAC thresholds.
Blood Alcohol Concentration Limits
Italy uses a tiered system of BAC (blood alcohol concentration, or tasso alcolemico) limits:
Standard adult drivers: The legal limit is 0.5 g/L (grams per litre of blood), equivalent to 0.25 mg/L of air in a breathalyser. Exceeding this is an offence.
Zero tolerance — 0.0 g/L limit: The following drivers must have zero measurable alcohol in their blood:
- Licence holders in their first three years (neopatentati)
- Drivers under 21 years old
- Professional drivers (trucks, buses, taxis, ambulances)
- Anyone driving with a blood alcohol between 0.0–0.5 who is also under 21
The exam tests this extensively. Any question asking about a driver who passed their test 18 months ago automatically invokes the zero-tolerance rule.
Penalties by BAC level:
- 0.5–0.8 g/L: administrative fine, 10 points deducted, licence suspension 3–6 months
- 0.8–1.5 g/L: criminal offence, fine, suspension 6 months to 1 year
- Above 1.5 g/L: criminal offence, increased fine, licence revocation for at least 1 year, vehicle confiscation
Night-time offences (22:00–07:00) carry double the fine for all BAC levels.
Drug Driving and Medicines
Illegal drugs: Zero tolerance. If you have any detectable level of illegal substances (cocaine, heroin, cannabis, MDMA, amphetamines) in your system, it is an offence regardless of whether your driving is impaired. The test is the presence of the substance, not impairment. Penalties are comparable to the 0.8–1.5 g/L alcohol bracket: criminal fine, suspension, and potentially revocation.
Medicines and prescription drugs: Legal medicines do not automatically disqualify you from driving but you have a duty of care. If your prescription medicine (including sedatives, antihistamines, muscle relaxants, or high-dose painkillers) causes drowsiness or impairs reaction time, you should not drive. If you do and cause an accident, impairment from a legal medicine can still be treated as an aggravating factor. Always read the medication leaflet for driving warnings.
Cannabis: Italy decriminalised personal possession of small quantities of cannabis but driving under its influence is illegal under drug-driving rules. THC is tested for in the same roadside saliva test used for other substances.
Breathalyser Tests and Refusal
Police can conduct random breathalyser checks (prova dell'etilometro) at any time. There is no requirement for them to suspect impairment — checkpoints are routine on Friday and Saturday nights.
Procedure: First a roadside breathalyser test (precursore). If it shows any alcohol, a second evidential breathalyser test is done. If that confirms a violation, a blood test may be ordered.
Refusal to take the test: Refusing to take a breathalyser test is treated as the most serious offence — equivalent to having a BAC above 1.5 g/L. Penalties include criminal charges, licence revocation, and possible vehicle confiscation. The exam often tests this: the correct answer is always that refusal is a criminal offence more serious than a positive test at the lower bracket.
The day after: It is possible to still be over the limit the morning after drinking. The exam includes scenarios asking whether a driver is safe to drive "the morning after a party" — the correct answer is that they should check or abstain.
Key Exam Points
- ✓Standard limit: 0.5 g/L blood alcohol. Zero tolerance for new drivers (first 3 years) and drivers under 21.
- ✓Above 1.5 g/L: criminal prosecution and licence revocation for at least 1 year.
- ✓Drug driving is zero tolerance for all illegal substances regardless of impairment.
- ✓Refusing a breathalyser test is treated as the most serious drink-driving offence.
- ✓Night-time offences (22:00–07:00) carry double fines.
Frequently Asked Questions
What is the legal blood alcohol limit for drivers in Italy?
The standard limit is 0.5 g/L (grams per litre of blood). However, zero tolerance (0.0 g/L) applies to drivers in their first three years after passing the test, drivers under 21, and all professional drivers. The breathalyser equivalent of 0.5 g/L is 0.25 mg/L of exhaled air.
Can you refuse a breathalyser test in Italy?
No. Refusing to take a breathalyser test is a criminal offence in Italy and is treated as more serious than testing positive at a low BAC. Penalties for refusal include criminal prosecution, a heavy fine, and licence revocation — the same as testing above 1.5 g/L. The exam always marks refusal as the wrong answer when presenting scenarios.
Is cannabis legal to drive with in Italy?
No. Even though Italy partially decriminalised personal cannabis possession, driving with any detectable level of THC in your system is a drug-driving offence. The saliva test used by police detects cannabis metabolites. Penalties are equivalent to mid-range drink-driving: criminal fine, suspension, and possible revocation.
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