A Trial to Test if TEV-56286 is Effective for Treatment of Participants With Multiple System Atrophy

Inclusion Criteria: * is considered to be "clinically possible" or "clinically probable" MSA as determined by the Gilman criteria * is medically and psychiatrically stable, as indicated by medical and psychiatric history, as well as physical and neurological examination * Females of child bearing potential (CBP) may be included only if they have a negative pregnancy test at the screening and baseline visits * Females of CBP whose male partners are potentially fertile (ie, no vasectomy) must use highly effective birth control methods * Males who are potentially fertile/reproductively competent (not surgically \[eg, vasectomy\] or congenitally sterile) and their female partners who are of CBP must use, together with their female partners, highly effective birth control methods * Additional criteria apply; please contact the investigator for more information Exclusion Criteria: * has 2 or more relatives with history of MSA, suggestive of an alternative diagnosis other than MSA * has participated in another clinical study involving administration of an IMP within 3 months or 5 half-lives (whichever is longer) of this IMP prior to screening * has a history of, or acknowledges, alcohol or other substance abuse in the 12 months before screening * is a female participant who is pregnant or breastfeeding, or plans to become pregnant during the study * has a known hypersensitivity to any components of the IMP * is of a vulnerable population (eg, people kept in detention or jail) * participant is using or consuming any prohibited concomitant medications within the specified exclusionary windows of this study * Additional criteria apply; please contact the investigator for more information