Risk of erythrocytosis, severe thrombocytopenia, & serious bleeding. Caution in patients w/ erythrocytosis who are at increased risk of thromboembolic events. Do not administer if patient is experiencing serious bleeding event. Monitor Hb & platelet count before each dose for the 1st 5 doses, or longer if values are unstable, & verify every 3-6 mth thereafter to determine if dose adjustments are required. Do not inj into sites that are scarred, tender, or bruised. Do not use same inj site on 2 consecutive inj. Contains polysorbate 80, which may cause allergic reactions. Clinical studies did not include participants w/ HIV-, portal HTN-, schistosomiasis-, or pulmonary veno occlusive disease-associated PAH. Has not been studied in patients w/ hepatic impairment (Child-Pugh class A to C); PAH patients w/ severe renal impairment (eGFR <30 mL/min/1.73 m
2). Pregnancy testing is recommended for women of childbearing potential before starting treatment. Women of childbearing potential should use effective contraception during treatment & for at least 4 mth after the last dose if treatment is discontinued. Not recommended during pregnancy & in women of childbearing potential not using contraception. Discontinue breast-feeding during treatment & for 4 mth after the last dose of treatment. May impair female & male fertility. Safety & efficacy in childn & adolescents <18 yr have not yet been established.