Does South Carolina test for specific drugs during DUI stops?
Answer:
Drug testing may be requested during a South Carolina DUI investigation when the legal requirements are met. Urine testing can be used when an officer reasonably suspects drug impairment. The sample type, testing procedures, and what the results actually show all need careful review; a positive result is not the same as automatically proving impairment.
Legal clarification — October 16, 2026: Blood testing is not limited to felony DUI cases. South Carolina Code § 56-5-2950(A) also permits a blood-sample request when a person cannot provide an acceptable breath sample for the reasons specified in the statute. The requirements and circumstances of the particular test still matter.
A DUI investigation may involve more than alcohol testing. If an officer suspects drug impairment, additional testing may become part of the investigation, subject to the applicable legal requirements.
The type of sample matters. A laboratory result needs to be understood in the context of the test performed, the substances reported, and the other evidence. An attorney should examine what the report does and does not establish rather than assume a positive finding answers every question about impairment.
Our attorney discusses concerns about interpreting urine results and the difference between detecting a substance and proving that a person’s ability to drive was impaired. Those issues require a review of the actual laboratory records and the circumstances of the case.
Blood testing is not categorically limited to felony DUI cases. South Carolina law includes circumstances in which a blood sample may be requested because a person cannot provide an acceptable breath sample.
A DUI defense attorney can review the testing request, sample collection, laboratory findings, and other evidence, then explain the available options. No outcome can be guaranteed.