Chemist Warehouse and My Chemist currently have a promo on Prevalin Allergy spray 20ml for $3.99 after $7 cash back via redemption. Upfront cost is $10.99.
Prevalin is suitable for both adults and kids over 6 years, pregnant and breastfeeding mothers and won't cause drowsiness.
For more info please check out their website:
http://www.prevalin.com.au/faq.html
Just remember to pick up your redemption form instore to apply for the cash back.
Interesting idea… Helpful for people who are only allergic to the inhalation of pollen though apparently. Those who suffer from dermal-reactions, such as contact with grass, seeds, dust mites, etc shouldn't use it though. =]