Can I take blood pressure pills while breastfeeding?

Yes. There are very few medications that absolutely can't be taken while breastfeeding. If you need specific information on your meds, you can access that on the web lactmed or the infant risk center, a service for mothers, at (806)-352-2519.
Yes. But this depends heavily on what medication you are taking. Post more info on the specifics and we can be more help if possible.