Chemist Warehouse is suffering major delays in its online delivery system and online orders are taking up to 14 days to be sent. It is sending $10 voucher for your next order as an apology. I can see no minimum spend or expiry date for the voucher in the e-mail.
If you need something non-urgent from Chemist Warehouse (those $10 credit for $x from Groupon are nearing expiry), then now is a great time to buy. Free shipping with $50 order, or $25 with Shipster.
Don't forget to get some freebies with $30 order.
Note: The $10 apology voucher is sent separate to the order confirmation e-mail.
Used mine Groupon last week, too bad