Study of Sodium Phenylbutyrate (ACER-001) for the Treatment of Patients With Medium Chain Acyl-CoA Dehydrogenase Deficiency (MCADD)

Inclusion Criteria: * A diagnosis of MCADD and molecular confirmation of at least one copy of the common c.985A\>G mutation. * ≥16 years of age for cohort 1 and ≥10-15 years of age for cohort 2. * Able to perform and comply with study activities including overnight admission to the PCTRC, placement of an IV catheter, and all blood draws. * Negative pregnancy test for all female subjects of childbearing age. * Signed informed consent by the subject or parent/guardian of minors. * All females of childbearing age and all sexually active males must agree to use an acceptable method of contraception throughout the study. Appropriate contraceptive methods include hormonal contraceptives (oral, injected, implanted, or transdermal), tubal ligation, intrauterine device, hysterectomy, vasectomy, or double barrier methods. Abstinence is an acceptable form of birth control, though appropriate contraception must be used if the subject becomes sexually active. Exclusion Criteria: * Use of any investigational drug within 30 days of Day 1. * Active infection (viral or bacterial) or any other intercurrent condition as reported by the subject or noted on physical exam at screening. * Any clinical or laboratory abnormality of Grade 3 or greater severity according to the CTCAE v5.0, or Grade 3 elevations in liver enzymes, defined as levels 5-20 times ULN in alanine aminotransferase (ALT/SGPT), aspartate aminotransferase (AST/SGOT), or gamma glutamyl transpeptidase (GGT) in a clinically stable…