NCT00004396

Who might be able to join this trial:

• You have been diagnosed with acute intermittent porphyria (a rare genetic condition affecting the body's ability to produce a substance called heme) and your condition has been in remission for at least 1 month
• Your body is producing higher than normal levels of certain substances related to porphyria that show up in urine tests
• You have had no symptoms of porphyria (such as stomach pain or nerve problems) for at least 1 month
• It has been at least 1 month since you last received a heme-based treatment
• If you are taking other medications for a different condition, you may still be eligible as long as the dose and schedule stay the same throughout the study
• Your urine test shows a specific level of a substance called porphobilinogen of at least 20 mg over a 24-hour period

Who may not be able to join:

• You are currently pregnant
• You are a woman who could become pregnant and are not willing or able to use effective birth control during the study and for at least 6 months before joining
• You are currently experiencing an active bleeding condition, such as bleeding in the stomach or intestines, or bleeding in the brain
• You have a known allergy or sensitivity to heme arginate, tin mesoporphyrin, or any similar heme-based substance
• You have another health condition that could put you at greater risk by taking part in this study (confirm with trial site)

Important: Always verify eligibility with the trial site directly before applying.