Table 2: Variation coefficients for amphetamine, methamphetamine e amfepramone.

Drug

VC (%)

Day 1

Day 2

Low Conc.

Median Conc.

High Conc.

Low Conc.

Median Conc.

High Conc.

Amphetamine

2.137

2.666

2.752

2.203

2.287

3.544

Methamphetamine

2.514

2.522

2.421

4.160

2.165

3.654

Amfepramone

3.413

2.202

2.380

4.870

2.037

3.525