What are common drug DWI defenses?

On Behalf of | May 23, 2025 | Drunk Driving

If you face a drug DWI charge in Minnesota, knowing common defenses helps you understand your options. Driving while impaired by drugs involves complex tests and strict laws. You want to challenge the evidence or the process to protect yourself.

Challenge the drug test accuracy

Drug tests in DWI cases use blood, urine, or saliva samples. These tests can contain errors if handled or processed incorrectly. You can question whether they did the test right, if the equipment was calibrated properly, or if contamination occurred. Timing matters, too, since drug levels in your system change quickly.

Question impairment evidence

Police officers base DWI charges on signs like erratic driving or failed field sobriety tests. You can argue that other factors caused the observed behavior, such as medical conditions, fatigue, or distraction. Field sobriety tests do not always provide accurate results, especially with certain drugs or health issues.

Dispute the legality of the stop or arrest

The police must have a valid reason to stop your vehicle to support a drug DWI charge. If officers lacked probable cause or violated your rights during the stop or arrest, you can argue that the evidence gathered should be excluded. This weakens the prosecution’s case.

Use prescription medication defense

If you took prescribed medication legally, you can show that you followed medical instructions and did not drive recklessly. You need to prove that your medication did not impair your driving or that you had no knowledge of its effects.

Use expert testimony

Experts can explain how drug tests work, what impairment looks like, or how other factors mimic drug effects. Their testimony may cast doubt on the prosecution’s evidence or interpretation.

Fight the charge with a strong defense

Drug DWI cases require careful review of evidence and police procedures. Minnesota law protects your rights under these defenses so you can contest the charge fairly.