There are two naphtols, derivatives of naphtalin, but beta-naphtol is the one prescribed.

Beta-Naphtol

A phenol occurring in coal-tar, but usually prepared artificially from naphtalin. It is used in the form of ointment with vaseline dissolved in alcohol, ether, or in olive-oil, in the proportion of two to ten per cent. Although not soluble in water, it is readily diffusible, and may bring on toxic symptoms if too lavishly applied to a fresh surface. The character of its toxic effects is similar to those of the other members of the group, and need not be described here.

Asaprol

A derivative of naphtol β. This new remedy has been carefully studied from the clinical standpoint by Dujardin-Beaumetz and Stockier. As it offers many advantages over other antiseptics of this group, some notice of its actions and uses is desirable. The dose for adults ranges from one to ten grammes (15 grs. to 3 ij)- It is best administered in the form of wafer or capsule, or, as it is very soluble, in solution in some aromatic water with sirup. It does not disorder the stomach nor cause headache, vertigo, or singing in the ears. Dyspeptics take it without any increase of their symptoms; but rather with relief to some of them. It has been administered in subjects affected with albuminuria without adding to the renal mischief. It has been taken by persons unable to tolerate sodium salicylate, quinine, and antipyrin. There is consequently a wide range of applications of asaprol where remedies of corresponding powers can not be administered.

Asaprol is an analgesic and antipyretic. In acute rheumatism it has proved to be as efficacious as the sodium salicylate, and it is far better supported by the patient. The daily amount required has ranged between 3 j and 3 iij, the individual doses being one gramme (15¼ grs.). In certain infectious maladies, as typhoid fever, influenza, etc., it has been specially useful. In intercostal neuralgia and neuralgia of the dental branches of the fifth nerve it has afforded prompt relief. Again, in sciatica it has acted favorably. Neuroses, of which asthma is a type, have proved amenable to its action.