When I hear about childhood migraines, it breaks my heart. I struggle with them as an adult and I can't imagine being the parent of a young child or adolescent with migraines. This area for kids needs more clinical studies and research but there's still a number of treatments to consider.
On this page you will find a list of suitable prevention treatments and recently approved medications to discuss with your doctor.
I have a whole section devoted to migraine relief for children - click here - So you may like to read these other related articles before you get to the heavy guns of medications.
The initial treatment for childhood migraine can vary substantially as children experience, in most cases, about two to four hours of migraine. If they rest at their first sign of attack, they may resolve themselves quickly and unaided.
If not, however you need to see your doctor. S/he will need to take every other factor into consideration, along with their age and weight.
Here is a list of the most commonly used medications:
Both Maxalt and Axert are approved for children and teenagers. Currently these triptans are providing the best migraine relief for children.
Imitrex is best taken with food as it can add to the nausea and cause vomiting. So, if vomiting is not occurring, the triptan should be taken at the earliest sign of attack.
Taking another tablet, pain killer, abortive, or additional medication dose after throwing up is not recommended.
This can cause accidental overdose.
Please be aware of this fact and check with you doctor about
what to do in this case with your child and their medications.
Terri Robert, in her book Living Well with Migraine Disease and Headaches, cites a team from the American Academy of Neurology Quality Standards Subcommittee and the Practice Committee of the Child Neurology Society that researched peer reviewed medical journals on pharmacological treatment of Migraine Disease in Children and Adolescents.
These recommendations for migraine prevention in children and
adolescents were found:
Flunarizine** - a calcium channel blocker, the study found probable effectiveness.
Side Effects: "Drowsiness, weight gain, nausea, heartburn, dry mouth or anxiety may occur as your body adjusts to the medication." Always, with any side effects it is important to tell your doctor immediately. 
Other things to watch for are: hives or a "skin rash,
depression, muscle aches, tremor, difficulty moving, abnormal or
uncontrolled movements (especially of the face or mouth)." 
There are also numerous precautions and warnings of drug interactions if your child is also taking over the counter (OTC) or other medications like: "sedatives, anti-anxiety medications, muscle relaxants, tranquilizers, or anti-seizure medications." 
**WARNING - this drug is no longer available in the United States. **
Most medications come with overdose information. Always watch for unusual changes in your child’s behavior, speech and posture. This includes confusion, unusual drowsiness, and a rapid or increased pulse rate. Have your local poison control center phone number somewhere handy in case of emergencies. Your pharmacist will have emergency numbers available as will your doctor.
US residents can call the US national poison hotline at 1-800-222-1222. Other residents of other countries should call the local poison control center directly.
Interestingly, the review found insufficient or conflicting evidence to make recommendations for using any of these for migraine prevention in children and adolescents:
So, out of all that, Flunarizine is the only one to possibly be considered in this review! However, there have been successful results with all of them in some cases with children.
*Inderal, Periactin and Depakote are all commonly used with successful results. So you might be back to trial and error depending on the desperation of finding effective pain relief for your child.
Every study I read says that more research must be done. This is one area that is understudied and more clinical trials are needed to determine the efficacy of these medications on children. Mind you, I wouldn’t want experiments with these kinds of medications being done on my child, who knows what long term effects it might have.
I just wanted to share some more links on this good news since the FDA approved Axert® (Almotriptan malate) for use in children over the age of 12.
Please click here for the US prescribing information details from Axert.com. 
Abortive therapies – more specifically triptans - were not previously recommended for migraines under the age of eighteen. However, "Sumatriptan
(Imitrex / Imigran) nasal spray was found to be effective and should be
considered effective treatment of acute migraine attacks in adolescents" over the age of 12.
Maxalt® (Rizatriptan) has recently been approved for the use of children from the age of 6. Finally some fantastic advances in the Pediatric area. Please click on these links for more details on the US prescribing information and patient information from Merck.com.
The homeopathic remedy Gelstat Migraine is also an option for childhood migraines
and adolescents. It has feverfew and ginger in it and has a unique
sublingual (under the tongue) delivery system. The directions are to
put it under the tongue and wait 60 seconds before swallowing it. This
system bypasses the digestive system which is upset and not functioning
in the initial stages of a migraine attack.
The studies show it has
been effective in 48-83% of treatments. It sure sounds worth a try. You can buy it at your local pharmacy.
These are just a few medications, at time of writing, that exist. Feel free to copy and past this page to print out and discuss with your physician.
Here's what else to consider for more effective migraine relief for your son or daughter:
Regardless of your child's age, migraines usually get better or go away altogether with sleep.
Migraine Relief For Children Resources:
1. Robert, Teri (2009) Living Well with Migraine Disease and Headaches. Harper Collins Publishers: NY.
2. Senelick, R. MD. at Web MD (2015) What Are Abdominal Migraines in Children and Adults. Available [Online] Accessed June 22, 2016.
3. MedicineNet.com (2012) Flunarizine Oral Capsule. [Online], Available at: http://www.medicinenet.com/flunarizine-oral_capsule_tablet/article.html Accessed June 2016.
4. Axert.com (2015) Adolescent and Teenage Migraines. [Online], Available at: http://www.axert.com/teenage-migraines Accessed June 22, 2016.
5. Gelstat Migraine - Available [online] at: https://www.gelstat.com/products/migraine