I usually get my Zyrtec from Chemist warehouse as they have the 70 packet there for $33.99. Other chemists sell it for a lot more and I have not seen the 70 pack at other chemists that I have been to.
They have $7 cashback for the 70 packet and you need to fill in a claim form and send it back.
Limit one per household. Claims must be received by 14/1/16
Snot often that you see them this cheap.