If it has not been long enough you will test positive for
amphetamines. There is a good possibility that at that low of a dosage and the fact that you dont normally take this drug it was eliminated from your body pretty rapidly since it was the IR tablet. Typically it takes about three days to be eliminated from the body. However, you need to be careful, this is not a drug to take without a physician properly administering this drug to you, it is highly psychologically addictive and can have severe cardiovascular consequences should you consume too much, and or have any latent cardiovascular conditions. Dont take this medication without consulting a physician first.