A portable drug sampling device for handheldly collecting a sample from exhaled breath of a subject for further sensor based analysis. The device comprising:a housing (406) comprising at least one inlet (407) and at least one outlet (408) for the exhaled breath to exit through, and a sampling membrane (302) arranged in the housing, a tubular element (40) having a mouthpiece section (401) for the subject to exhale into, and a saliva trap section comprising baffles (103) that create a non-straight gas flow path for letting aerosols pass through the tubular element. The sampling membrane (302) is arranged to collect the aerosols from the exhaled breath. The device further comprises a volume collecting element (208).
