τετραφάρμακος
From LSJ
λύπης ἰατρός ἐστιν ὁ χρηστὸς φίλος → a true friend is grief's physician, a worthy friend is a physician to your pain
English (LSJ)
ον,
A compounded of four drugs:—as Subst., τετραφάρμακος, ἡ, a compound of wax, tallow, pitch, resin, Meno Iatr. 14.19, Ph.1.433 (= Stoic.2.154), Gal.1.242; also -κον, τό, Id.12.328. II -κος, ἡ, metaph., of the first four Κύριαι Δόξαι of Epicurus, Phld.Herc.1005.4.