Tweet. There are no known adverse reactions between Plavix (Clopidogrel) and eating grapefruit, or drinking grapefruit juice. Furthermore, there is no sufficient evidence that illustrates grapefruit juice, or the fruit itself would interfere with the effectiveness of Plavix.
Other, more minor side effects include constipation, headache, dry mouth and insomnia (because the chemicals in these drugs also influence sleep patterns). Herbal diet pills, even though they're all natural, can have potentially dangerous side effects depending upon their ingredients.
Gastrointestinal side effects. Gastrointestinal, or stomach problems are one of the Adderall side effects in adults. These side effects are stomach pain, nausea, vomiting, diarrhea, constipation, loss of appetite, and weight loss. You may experience some of these symptoms if you take Adderall. Neurological side effects.