Poppy (papaver somniferum) - relieves insomnia, relieves headaches, anesthetic, soothes respiratory problems, deadens pain.
And of course, honey was widely used, a natural antibiotic and used to dress wounds and as a base for healing unguants, as was castor oil,
coriander,beer and other foods.
Resources
de Vartavan, Christian, & Amoros, Victoria Asensi, " Codex des restes vegetaus de 'Egypte ancienne", 1997 Triade Exploration Press
Ebeid, Nabil I. , "Egyptian Medicine in the Days of the Pharaohs
Hepper, F. Nigel, "Pharaoh's Flowers: Botnaical Treasurs of Tutankhamen"
Manniche, Lise, "An Ancient Egyptian Herbal", 1989, University of Texas Press
Nunn, John F., "Acient Egyptian Medicine, 1996, University of Oklahoma Press
Here is a medical kit from a temple relief at Kom Ombos.

1) knives; (2) drill; (3) saw; (4) forceps or pincers;
(5) censer; (6) hooks; (7) bags tied with string; (8, 10)
beaked vessel; (11) vase with burning incense; (12) Horus
eyes; (13) scales; (14) pot with flowers of Upper and Lower
Egypt; (15) pot on pedestal; (16) graduated cubit or papyrus
scroll without side knot (or a case holding reed scalpels);
(17) shears; (18) spoons. The instruments to the left of the
spoons are not identified but they look to the author to be
sounds. And what are the devices next to the hooks? Some
say that these implements are too large to be surgical
instruments but the Egyptians did not carve reliefs to
scale. Furthermore, this collection is located in an area
with other reliefs showing medical motifs including the
queen giving birth.