Possibility of drug induced
liver injury presenting as spotting between periods is there, but pretty low. It can be probably because of other common causes like PCOS, pregnancy, infection,
thyroid issues etc. Kindly mention about other symptoms, also history is important to come to a diagnosis.
Next Steps
you can consult me if you have other queries or, if the symptoms are getting more frequent, we could rule out common causes with detailed history and lab tests.