These were a bit expensive, but you can find advil coupons almost anywhere.
They do work, I found they worked well on back pain and cramps as well.
Not only do they work for headaches

Advil Extra Strength Liqui-Gels are my go to pain reliever. As a competitive athlete, on competition days I often need some pain relief due to chronic injuries I deal with and the Advil Extra Strength Liqui-Gels always help me get through the pain and be the best that I can be.

This stuff is amazing!! I get really bad headaches atleast once a month and Advil Extra Strength Liqui-gels is the only thing that helps and I love the fact that I only need to take 1 every 8-12 hours instead of taking 1-2 every 3-4 hours. Would recommend this to anyone who gets extremely bad headaches/migraines.

If I just have a normal headache or slight pain, these work pretty well. I have a high tolerance to pain meds unfortunately, so most over the counter pills do nothing. These work a bit if the pain isn't too far gone.

Advil extra strength liqui-gel is my go to when i suffer from migraines/headaches.
It sooth the pain really quick, i always have some in my purse and some at home.

They work well for easing my cramps when I'm menstruating monthly. One of the liqui-gels is usually all it takes for the dosage and it works faster than tablet form (usually within 20-30 minutes). Plus, the liqui-gels are easy to swallow. As they are not the cheapest ones on the shelf, I wait to buy them when they are on sale.

I started using these when I began developing pms-related migraines. As soon as I felt one starting, I took 2 of these, and if necessary, a couple of more a while later. It stopped the pain and allowed me to take care of my kids, and function at work. I always carry these with me.

Id rather use Advil liquid gels because it seems to work faster nd relives the pain faster then any other liquid gels , I would recommend this product to anyone who needs it

Love this product. Works so well for muscle aches. Sometimes it only takes one dose to help to alieviate the pain I am suffering from. Would recommend Advil liqui-gels to anyone who is experiencing muscle pain.

I used to swear by regular Advil Liqui-Gels but these extra strength are even better! I take one and I can feel my pain start to ease away very quickly. Great product!