Your Acne medicine is made up of Isotretinoin.This medicine has lots of undesirable effects but high blood pressure is not usually one of them.125mmhg for systolic blood pressure is fine , the 89 for diastolic is borderline.I suggest that you monitor your blood pressure for 1 week.If the diastolic pressure keeps to be on the high side then you should consult with your doctor. He will check for other causes for the high blood pressure then he will decide what to do