Sananga are eye drops made from the Tabernaemontana sananho plant, and used medicinally by several Amazonian tribes; most notably the Yawanawa, Huni Kuin, and Matses. They are used traditionally to treat eye conditions, improve visual perception before a hunt, and to enhance the effects of other plant medicines.

Although sananga eye drops sting and hurt, this pain is considered an important part of their therapeutic benefits, by expelling the negative energies (panema) from the body.