Table 5.

Examples of drugs and adverse reactions extracted by the annotation.

Drug effects	Medical entity	Example
Present (ie, adverse reactions)	Drug: citalopram (Racine Pharma); Adverse reactions: insomnia, nausea (MedDRAa)	“Citalopram gave me the same side effects as setraline, insomnia and nausea.”
Absent	Drug: androcur (Racine Pharma); Adverse reactions: weight gain (MedDRA)	“My taking of androcur didn’t have weight gain as a consequence.”

^aMedDRA: Medical Dictionary for Regulatory Activities.