From pharmakeus; medication ("pharmacy"), i.e. (by extension) magic (literally or figuratively) -- sorcery, witchcraft.
see GREEK pharmakeus
a. the use or the administering of drugs (Xenophon, mem. 4, 2, 17).
b. poisoning (Plato, Polybius, others): Revelation 9:21 (here WH text Tr marginal reading φαρμακῶν; many interpretations refer the passage to the next entry).
c. sorcery, magical arts, often found in connection with idolatry and fostered by it: Galatians 5:20 (where see Lightfoot) (Wis. 12:4 Wis. 18:13; for כְּשָׁפִים, Isaiah 47:9; for לָטִים, Exodus 7:22; Exodus 8:18; for לְהָטִים, Exodus 7:11); tropically, of the deceptions and seductions of idolatry, Revelation 18:23. STRONGS NT 5331: φάρμακον [φάρμακον, φαρμάκου, τό, from Homer down, a drug; an enchantment: Tr marginal reading WH text in Revelation 9:21 (R. V. sorceries), for φαρμακεία, which see (in b.).