Table 3.

UDST results obtained after adulteration of drug-positive urine samples with household chemicals

Adulterating agent	Urine positive for
	Opiates	Cannabinoids	Amphetamine	MDMA	Cocaine	Alprazolam	Diazepam
WC Sanitar	Invalid	-	Invalid	Invalid	+	Invalid	Invalid
Vinegar	-	-	-	-	+	-	-
Lemon juice	+	-	-	-	+	-	-
Citric acid	+	-	Invalid	+	+	Invalid	Invalid
Cevtok	Invalid	Invalid	Invalid	Invalid	Invalid	Invalid	Invalid
Varikina	-	-	-	+	+	+	+
Asepsol	+	-	Invalid	Invalid	Invalid	Invalid	Invalid
Primosept GA	+	+	Invalid	Invalid	Invalid	Invalid	Invalid
Visine	+	+	+	+	+	+	+

“+” – test remained positive; “-” – test became negative; “Invalid” – omitting of control line or both lines on test strip