KPacheco - Voltaren is sometimes used for Migraine, however it is a drug that can result in MOH, so care is necessary and normal MOH precautions taken. https://migraine.com/blog/help-how-can-i-not-overuse-migraine-medications/ It doesn't address the Migraine itself, and therefore could potentially end a patient up in a worse situation, so care and direction under the guidance of a knowledgeable physician is really a must.
Voltaren is diclofenac sodium, and a special formulation designed for Migraineurs called Cambia https://migraine.com/blog/cambia-approved-for-treatment-of-migraine/ can be purchased Rx if it is helpful to you. Here is a special coupon for Cambia: https://migraine.com/offer-center/migraine-prescription-drug-coupons/cambia/ Used with other NSAIDs, it could be extremely dangerous however.
The gel is the same active ingredient as the pill or powder, however it is applied topically and therefore reaches specific areas in a more concentrated way. I want to caution you however, and everyone else reading this...
Please, never change your current management protocol without first discussing it with your doctor. Do NOT use medicines that were prescribed for another person. This is dangerous and I can't begin to tell you of the seriousness of doing this without talking to your doctor first.
Voltaren can cause problems when taken in certain circumstances. I don't know what you are taking currently, and only your doctor can really help you decide what is okay and what is not, but I am urging caution here.
I used a similar drug topically - indomethacin. It did help me, but the help was very temporary. Taking it topically meant I couldn't take it any other way, and I got more benefits from taking it systemically vs. in a targeted manner.