The good news is, there are very few medications that you truly cannot use during breastfeeding - and if it's not recommended, there is typically an alternative. Unfortunately, a lot of mothers are given poor advice to discontinue breastfeeding for certain medications that are fine - typically because of lack of education or fear of lawsuits. I would suggest always contacting the Infant Risk hotline for any concerns - they are the true experts on all things breastfeeding and medications.