Adverse drug reaction	Drug	ATC	Number of reports	% of the reports (n = 1688)*
Medication errors NEC	Phytomenadione	B02BA01	84	5.0
Maladministration	Phytomenadione	B02BA01	71	4.2
Anaemias NEC	Zidovudine	J05AF01	60	3.6
Adverse effect absent	Phytomenadione	B02BA01	39	2.3
Neutropenias	Zidovudine	J05AF01	31	1.8
Renal failure and impairment	Ibuprofen	C01EB16	24	1.4
Intestinal ulcers and perforation NEC	Ibuprofen	C01EB16	20	1.2
Maladministration	Chlorhexidine	D08AC02	17	1.0
Infections NEC	BCG vaccine	L03AX03	16	0.9
Colitis (excluding infective)	Zidovudine	J05AF01	15	0.9

^* Because individual reports may contain more than one active substance – HLT pair, the sum of all percents would be >100%

NEC not elsewhere classified.