There is a Target store coupon for $1.50/1 Aquafresh Extreme Clean Toothpaste. The coupon now has no size restrictions! I had printed this one just 4 days ago and it clearly stated excludes trial size. However, now when I print it, there is not any size exclusion. That means it can be used on trial sized items.
The only thing to note is that the coupon clearly states that the value can not exceed the price of the item, so the cashier can adjust the coupon down to the price of the toothpaste. Keep in mind some cashiers may have issue with this, so just know that before you go in to use the coupon.