Angelbutterfly - I've been avoiding those medications in TWW. I think panadol is better than the ibuprofen etc. But I'd ring the medication hotline 1300 MEDICINE (1300 633 424) and check it out. Only problem is I think they're business hours. Or Medicines Line: 1300 888 763 which I think answer into the evening. Hope this helps.
By the way, not a silly question at all. I've heard the same about the 6 weeks but not positive if it's true.