Can you eat grapefruit while taking Adderall?

No, you should not drink Grapefruit juice while on adderall, or any other juices high in Vit. C. Although it is safe and won't hurt you at all, you may start to feel bad because it will lower the affects of the Adderall.

Adderall, Dexedrine, and Dextrostat, and couple others can all be "washed out" of your system if you drink or eat any acidic juice or fruit. It alters the pH balance of your stomach and causes the Adderall to be excreted through your urine much faster than it normally would.

Taking Adderall or Dexedrine and then drinking Orange juice basically cancels out much or most medication benefit. However, if you ever want to cancel out medication-induced side effects like insomnia or a headache, then now you know what to do.

Juices with high acidity:
Orange
Grapefruit
Cranberry
Lemonade
Cranapple
V-8
Tomato
and a few others


Alkaline foods have the opposite effect.

Well actually, when we EAT/metabolize grapefruit, it has a significant ALKALIZING effect. They have a PRAL value of around - 6 and although they are citrus fruits and therefore acidic in their native form, the pH of their "ash" (when they have been metabolized by the body) classifies it ( tomatoes too, for example) as an alkalizing food.