- Acute intermittent porphyria is probably the most common porphyria with acute
- The disorder results from low levels of the enzyme responsible for the third step in heme production.
- Red urine
- Sensitivity to sunlight
- Blister (bulla) formation on exposure to sunlight
- Skin swelling (edema) on exposure to sunlight
- Crampy abdominal pain (may be extremely severe)
- Pain in the limbs
- Pain in the back
- Personality change
- Numbness or tingling
- Muscle pain
- Muscle weakness or paralysis
- During an attack, a person may also experience muscle weakness, seizures, and mental changes such as anxiety and hallucinations.
- Attacks are triggered by nongenetic factors such as certain drugs, alcohol, smoking, dieting or fasting, certain hormones, other illnesses, and stress.
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