Can you take GABA and Concerta at the same time?

I take 56mg of Concerta and 750mg of GABA and I do not recommend taking the both! I've been getting hot flashes, dizzy spells and increased heart rate. At times I feel like I'm going to have a heart attack. I recommend if mixing the both medications to get a low dosage of GABA or a lover dosage of Concerta. And do not drink energy drinks if taking both medications, it felt horrible.