Whatprecipitates a porphyria attack?

Depends on the type: There are 8 different kinds of porphyria. Depending on the type of porphyria, an attack can be precipitated by sunlight exposure, alcohol, inadequate diet, carbohydrate restriction, certain drugs or chemicals, hormonal changes & stress. Often a combination of triggers can precipate an attack. For more info, see the porphyria foundation's website: http://www.Porphyriafoundation.Com/about-porphyria.

Among other things..: Porphyria can be triggered by drugs (barbiturates, tranquilizers, birth control pills, sedatives), chemicals, fasting, smoking, drinking alcohol, infections, emotional and physical stress, menstrual hormones, and exposure to the sun. Attacks of porphyria can develop over hours or days and last for days or weeks.