Getting pulled over on suspicion of drunk driving can make your heart race. The flashing lights, the officer’s questions and the possibility of arrest all hit at once.
In that tense moment, many drivers wonder whether they should take or refuse the breathalyzer test. While refusing may seem like a way to protect yourself, Missouri’s laws make that choice far more complicated than it appears.
Understanding Missouri’s implied consent law
When you drive in Missouri, you automatically agree to take a chemical test — such as a breath, blood or urine test — if a police officer lawfully arrests you for driving while intoxicated (DWI).
This agreement, known as implied consent, means that refusing a chemical test triggers a separate and immediate administrative penalty — a one-year license revocation imposed by the Department of Revenue — which is independent of and can begin even before any criminal DWI case proceeds.
What happens if you refuse the test
If you decline the breathalyzer, you could face:
- Automatic license suspension for one year, even if you are never convicted of DWI
- Immediate arrest based on the officer’s observations or field sobriety test results
- Loss of evidence that might have helped prove your innocence later
- Hardship in court, since prosecutors can use your refusal as evidence of guilt
These penalties can start affecting you right away, leaving little time to prepare or respond. Making that decision on the spot is also risky without legal guidance.
Make an informed choice
Every DWI stop involves unique facts. Before you decide whether to take or refuse a breathalyzer, you need to understand both your rights and the long-term consequences.
Taking a moment to learn how Missouri’s laws apply to your situation can help you make a decision that best protects your driving privileges and future opportunities.