Instructed in new medication Amoxicillin and in S/E such as lethargy, hallucinations, seizures, anxiety, confusion, agitation, depression, dizziness, fatigue, nausea, vomiting, diarrhea, glossitis, stomatitis, gastritis, abdominal pain, enterocolitis, pseudomembranous colitis, black tongue, interstitial nephritis, nephropathy, vaginitis, anemia, thrombocytopenia, thrombocytopenic purpura, eosinophilia, leukopenia, hemolytic anemia, agranulocytosis, hypersensitivity reactions, anaphylaxis, and overgrowth of nonsusceptible organisms. Notify MD if rash, fever, or chills develop. A rash is the most common allergic reaction, especially if allopurinol is also being taken.