Table 2:

Use of oral contraceptives and other acne medications before and during isotretinoin treatment

Other medication use	Province; no. (%) of participants
	British Columbia n = 37 285	Saskatchewan n = 10 890	Manitoba n = 6 741	Ontario n = 4 355
During isotretinoin therapy
Oral contraceptives	11 378 (30.5)	2 651 (24.3)	2 219 (32.9)	1 183 (27.2)
Other acne medications	11 020 (29.6)	1 332 (12.2)	1 407 (20.9)	891 (20.5)
In 12 mo before isotretinoin therapy
Oral contraceptives	13 398 (35.9)	3 153 (29.0)	2 268 (33.6)	1 233 (28.3)
Other acne medications	26 863 (72.0)	6 606 (60.7)	4 283 (63.5)	1 976 (45.4)