Conditions: Essential Thrombocythemia (ET)
Allocation: NA | Intervention model: SINGLE_GROUP
Enrollment: 41
Healthy volunteers: no

Brief summary:
The purpose of this study is to provide SPD422 to subjects who completed Study SPD422 308 and, in the opinion of the Investigator, will continue to benefit from treatment.

Detailed description:

Arms:
arm 1: None

Interventions: intervention 1: SPD422 (anagrelide hydrochloride)
Intervention descriptions: intervention 1: Subjects will be continued on the dose of anagrelide that controlled their platelet levels in Study 308 and titrated if necessary.

Protocol document: