Drug Interaction Study of Pyronaridine-artesunate & Metoprolol, & Redosing Study of Pyronaridine-artesunate

"On Day 1, subjects will receive a single oral 100 mg dose of metoprolol tartrate. On Day 8 and Day 9, subjects will receive a once daily oral dose of pyronaridine-artesunate as follows:~55 - \< 65 kg: 3 tablets (180:60 mg pyronaridine:artesunate)~≥ 65 kg: 4 tablets (180:60 mg pyronaridine:artesunate)~On Day 10, a 100 mg dose of metoprolol will be coadministered with pyronaridine-artesunate at the above dose.~On Days 98 - 100, subjects will receive pyronaridine-artesunate once daily at the same dose described above. Followed by a 40 day follow-up period."

"On Days 1 to 3, subjects will receive 3 days of pyronaridine-artesunate as follows:~55 - \< 65 kg: 3 tablets (180:60 mg pyronaridine:artesunate)~≥ 65 kg: 4 tablets (180:60 mg pyronaridine:artesunate)~On Days 61 to 63, subjects will be redosed with a 3 day course of pyronaridine-artesunate at the above dose.~Followed by a 40 day follow-up period."