Drugs and driving — New Jersey Permit Test
Drugs and driving on the New Jersey permit test — 4 rules, each with the reason behind it and a question on it while it is fresh.
The rules
It is illegal to drive in New Jersey under the influence of drugs, or while holding a drug without a valid prescription.
A prescription drug can slow a driver as much as alcohol does, and the law treats it the same way.
It is illegal to operate a motor vehicle on New Jersey roadways while under the influence of any drugs or while in possession of any drug without a valid prescription.
A drug labeled as possibly causing drowsiness or dizziness should not be taken before driving.
The label is the warning. A cold pill can put a driver to sleep at the wheel of a moving car.
Drugs that “may cause drowsiness or dizziness” should not be taken before driving.
Alcohol should never be mixed with drugs or medications.
Together they do more than either would alone, and nobody can predict how much more.
Alcohol should never be mixed with any drugs or medications.
After alcohol, marijuana is the drug found most often with drivers involved in crashes.
It costs a driver tracking, distance judgment and attention, which is most of the job.
After alcohol, marijuana is the drug most often found with drivers involved in crashes.
On the test
What does New Jersey law say about driving under the influence of drugs?
It is illegal, prescription or not. A prescription drug can slow a driver as much as alcohol does, and the law treats it the same way. New Jersey Driver Manual, p.117: “It is illegal to operate a motor vehicle on New Jersey roadways while under the influence of any drugs or while in possession of any drug without a valid prescription.”
How this works
Most practice tests hand you a bank of questions and leave the manual somewhere else. This one puts them together.
You read one law and the reason behind it, then answer a question on that law while it is still fresh. Get it right and you move on; get it wrong and you have found the gap while it is cheap to fix, not on the morning of the exam.
Learning one rule at a time, and proving it immediately, is what turns a manual you skimmed into something you actually know — and it makes studying feel like getting somewhere rather than like waiting to find out.
What it costs
- One payment, once — not a subscription. Nothing renews and there is nothing to cancel, for an exam you sit one time.
- Free to start: a 10-question test and the first section of cards. No sign-up and no account.
- Paying opens the rest of the cards, unlimited full-length practice tests, and retests built from exactly the questions you got wrong.
- Every level up to Prepared — 3 tests passed in a row.
- Do the work, fail the real exam, and we refund you.
Where these come from
Every rule here is checked against New Jersey Driver Manual, published by the New Jersey Motor Vehicle Commission, and against the state code itself. Last checked 2026-09-15.