--Hypercalcemia, constipation, nausea, abdominal pain, muscle weakness, mental disturbances, polydipsia, polyuria, bone pain, nephrocalcinosis, renal impairment, zinc toxicity, allergic reactions (skin rash, itching, redness), gastrointestinal disturbances, loss of appetite, metallic taste, headache, dizziness, sleep disturbances, blood disorders.