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The symptoms of severe lead poisoning include abdominal pains , headaches , vomiting , confusion , muscle weakness , seizures , hair loss , and anemia . PrecautionsTreat women who are breastfeeding only when risk of delayed treatment outweighs possible risks to the newborn caused by ivermectin excretion in milk ; repeat courses of therapy may be required in patients who are immunocompromised ; may cause nausea , vomiting , fever , headache , myalgia , sore throat , cough , and drowsinessDrug NameDiethylcarbamazine ( Hetrazan ) - - Precise mechanism is not understood . Patients taking PO morphine frequently experience nausea , vomiting , constipation , and bowel obstruction from increased doses . As well as suppression of pain , effects may include dizziness , light headiness , reduced mental alertness , drowsiness , mild anxiety and depression or euphoria , contraction of pupils , blurred vision , nausea , vomiting , constipation , itchy skin . Seven ( 14.3 % ) of the 49 participants who received zidovudine , compared with one ( 2.9 % ) of the 35 placebo recipients , elected to discontinue therapy because of subjective , reversible symptoms , including nausea , vomiting , fatigue , headache , myalgia , or cough . IgE-mediated reactions can include symptoms in the upper gastrointestinal tract such as nausea , vomiting , reflux , refusal to eat , and eating ravenously ; lower GI symptoms may include blood in stools and diarrhea .