10 Common Digestive Disorders. Epigastric pain is not a serious symptom on its own. However, if it occurs with other life-threatening symptoms, it may be a sign of a condition that should receive immediate medical treatment, such as a heart attack.
SIDE EFFECTS. The most common adverse reactions of fenfluramine are drowsiness, diarrhea, and dry mouth. Less frequent adverse reactions reported in association with fenfluramine are:
More common phentermine side-effects: The first and most common of these side effects are a number of small complications. Many phentermine users develop dry mouth, or a persistent bad taste in their mouth.ental side effects from taking phentermine can be even more severe. The worst potential mental side effect of phentermine is psychosis, but patients have also developed hallucinations from the drug.