Panadol Extra contains paracetamol and caffeine, so it is worth checking the specific timing with your PD or even calling KKH's lactation consultant line, as they can give you a precise answer based on the exact ingredients and dosage. Using your freezer stash in the meantime is a really sensible move, and it is good that you already have that buffer. I would not just go by a general estimate found online for something like this, since getting the right clearance time from a professional will give you more peace of mind. It might also be worth checking the packaging insert, as it sometimes has guidance on breastfeeding specifically.