What's the minimum volume of urine required for drug and other various general tests? I gave nearly 1/4 quantity of standard size cup. Is it ok?

Tests can be. be performed on a very small quantity (DIPSTICK) for drugs (opiates, cocaine etc) but a CERTAIN AMOUNT is needed for CONFIRMATION of POSITIVES or other more complex drugs (antu-depressants etc) Generally the amount you gave should be the required amount or you should not have been allowed to leave the testing site! Hope this helps! GOOD LUCK! Dr Z.