Heal enables the character to channel positive energy into a
creature to wipe away disease and injury. It completely cures all
diseases, blindness, deafness, hit point damage, and all
temporary ability damage. It neutralizes poisons in the
subjects system. so that no additional damage or effects
are suffered. It offsets a feeblemind spell. It cures those
mental disorders caused by spells or injury to the brain. Only a
single application of the spell is needed to simultaneously
achieve all these effects.
Heal does not remove negative levels, restore permanently
drained levels, or restore permanently drained ability scores.
If used against an undead creature, heal acts like harm.