Bronchospasm, hypersensitivity, anaphylaxis, and anaphylactoid reactions.
Transient ECG changes, including QT-interval prolongation with potential for torsade de pointes, tachycardia, bradycardia, and angina.
Anxiety, headache, drowsiness, fatigue, fever, and dizziness.
Rare reports consistent with, but not diagnostic of, extrapyramidal reactions.
Oculogyric crisis, appearing either alone or with other dystonic reactions.
Diarrhea and constipation.
Rare cases of grand mal seizure.
Cases of transient blindness, predominantly during intravenous administration, have been reported.
Use in pregnancy. FDA Category B. Not likely to cause harm when used as short-term therapy (See Introduction in Section III).