In case you enter a discount code during checkout that doesn't exist or isn't currently active, then you can see the message: “Unable to find a valid discount matching the code entered”.

Usually, Coupon Stacking is not allowed at Mediflow. However, the store will surely give out notice if available.

Yes, it has ever. It may not be available now, but it is completely possible for loyal customers of Mediflow to get it by tracking all of its promotion programs.

Yes. Like all other stores, Mediflow offers a number of Cyber Monday Coupons. Don't forget to check the expiry date before making your purchase.