My sister is getting mild brown discharge since last two days. She was diagnosed with endometriosis and ovarian cyst, and had surgery 2 years back. Since then she is taking Emersa 2 mg tablet regularly as per doctors direction. She is having brown discharge since last 2 days. She had protected intercourse a few times during the last month. What could be the possible reason? Is it for the drug? Is period possible while taking this medicine