Such remedies as exhilarate the spirits, and restore flesh and strength. See Cardica and Restaura' ntia.
Dr. Cullen says, they are medicines suited to restore the force of the body when lost, and are sometimes stimulants; but more commonly nutrients. The term he considers as attended with ambiguity, and thinks that it should be rejected.
Besides the nutritious quality of restoratives, they are supposed to have a fragrant, subtile, oleous principle, which immediately affects the nerves, warms and stimulates the whole system. No such principle, however, exists; at least no such has been discovered.
In diseases, the speediest way to restore strength is to remove the causes of debility; but this is not to be done by medicines, which increase only the vital heat; for in convulsions and fevers the motions are very strong, and yet the natural strength is languid. True strength, however, depends rather upon proper aliments, turned into wholesome blood; the only source of firmness and vigour.
Cordial flowers and herbs, musk, ambergrise, oil of cinnamon made into olea sacchara, chocolate, shell-fish, etc. are the supposed analeptics; but they are only such as stimulating nutrients.