Amum I took pseudoephedrine in Nurofen cold and flu tablets earlier this year when I was really sick and I was breastfeeding Marc. Within 48 hours I had almost lost all my milk. I was devastated. It happened really quickly. The dr didn't warn me which is pretty bad. I agree with what the others have said only express a little bit for comfort. Both times with the girls it didn't take long for the hard feeling to subside. I still produced milk for ages but nothing much. Good luck.
Well I got to meet the gorgeous Nessie and Ash today . We had such a lovely morning at the park. It's so wonderful to meet other people on this thread IRL.