Kent's Repertory of the Homoeopathic Materia Medica › HEAD › PAIN, headache in general › periodic headache › every three or four days

seven days

James Tyler Kent · Kent's Repertory of the Homoeopathic Materia Medica · 6th American edition · p. 145 · 14 remedies
seven days

Grade 2 — the book’s highest

lac-d. iris. sang. sil. tub. phos. sulph.

Grade 1

phyt. calc-ar. gels. nux-m. ars. psor. lyc.

Cite: James Tyler Kent, Kent's Repertory of the Homoeopathic Materia Medica, 6th American edition, p. 145 — HEAD; PAIN, headache in general; periodic headache; every three or four days; seven days