AIP	Acute intermittent porphyria
AHP	Acute Hepatic Porphyrias
ALA	$\delta$-aminolevulinic acid
ALAS1	ALA synthase 1
APA	acute porphyric attack
AP-AC	AHP patient—asymptomatic carrier
AP-BA	AHP patient—asymptomatic with biochemical alterations
AP-SP	AHP patient—symptomatic
ED	endothelial dysfunction
ET1	serum endothelin-1
HMBS	hydroxymethylbilane synthase
IV	intravenous
IU	International Units
NO	nitric oxide
NOS	NO synthase
PAKD	porphyria-associated kidney disease
PBG	porphobilinogen
PPOX	protoporphyrinogen oxidase
PRES	posterior reversible encephalopathy syndrome
sGC	soluble guanylate cyclase
ULN	upper level of normal
VP	Variegate Porphyria