The following adverse reactions are described elsewhere in the labeling, Hypersensitivity reactions. The following adverse reactions associated with the use of technetium Tc 99m exametazime have been identified in clinical trials or post-marketing reports. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. Cardiovascular: transient blood pressure increase Skin and subcutaneous tissue disorders: rash, generalized erythema, urticaria, angioedema, pruritus. General disorders and administration site conditions: facial edema, fever, asthenic conditions (e.g., malaise, fatigue). Nervous system disorders: headache, dizziness, paraesthesia. Vascular disorders: flushing. Gastrointestinal disorders: nausea, vomiting.