Sponsor elected not to continue with study

This study will use specific diagnostic tests on a group of patients who are experiencing symptoms typical of acute hepatic porphyria (AHP) to determine how many have the condition, and to potentially help improve the diagnostic process for patients in the future.

Inclusion Criteria:

• ≥ 16 years of age
• Recurrent and severe episodes of abdominal pain that last for at least 24 hours
• At least 1 episode of severe abdominal pain that required an urgent healthcare visit in the past 12 months
• Other symptoms related to AHP that your doctor will discuss with you
• Willing and able to comply with protocol required assessments and provide written informed consent

Exclusion Criteria:

• Known diagnosis of AHP
• Alternative explanation for abdominal pain with clinical response to treatment specific for alternative diagnosis

Male and female participants age ≥ 16 years who present with symptoms consistent with Acute Hepatic Porphyria such as recurrent and severe episodes of abdominal pain.