How to Detect a Counterfeit Drug

Are you examining a drug in the field?

Do tablets or capsules show the wrong shape, size or color?

Are pill markings wrong?

Is the packaging different?

Do pills or tablets show different physical properities (easily crumble or break apart, etc.)?

Does scanning the product in a simple spectrometer show differences from the legitimate product?

Can you perform a simple colorimetric assay to detect active drug?