hylands homeopathic mag phos 6x, 1000 tab hyland's homeopathic magnesia phosphorica 6x (magnesium phosphate) is a cell salt indicated for the relief of muscle cramping ̧ shooting ̧ darting or spasmodic pain ̧ and nerve pains. hyland’s homeopathic since 1903. mag. phos. 6x. muscle cramps and pains relieved by warmth.