ACTION AND USES: Has been recommended in solutions as a nerve tonic in all kinds of wasting and nervous diseases. The weight of evidence indicates that the glycerophosphates are not superior to ordinary phosphates and that the claims for them as nerve tonics are, therefore, unfounded. DOSAGE: 0.25 Gm. or 4 grains (U.S.P.). _Elixir Glycerophosphatum Compositum (Elix. Glycerophos. Co.), Compound Elixir of Glycerophosphates, N.F. _(Compound Solution of Glycerophosphates).--Solution of sodium glycerophosphate (4%), calcium glycerophosphate (1.6%), ferric glycerophosphate (0.3%), soluble manganese glycerophosphate (0.2%), quinine glycerophosphate (0.1%), strychnine glycerophosphate (0.015%), lactic acid (1%) and compound spirit of cardamom, in alcohol, glycerin and water. Absolute alcohol content about 12 per cent. USES: A highly complex and therefore irrational preparation of the inactive glycerophosphates. DOSAGE: 8 Cc. or 2 fluidrachms (N.F.). _Liquor Sodii Glycerophosphatis (Liq. Sod. Glycerophos.). Solution of Sodium Glycerophosphate, U.S.P._--Anhydrous sodium glycerophosphate (not less than 50%) in water. DOSAGE: 0.35 Cc. or 6 minims (U.S.P.) =*Sodii Hydroxidum (Sod. Hydrox.), Sodium Hydroxide, U.S.P.= (Caustic Soda, Sodium Hydrate).--NaOH (not less than 90%). White, odorless masses or hard, brittle sticks. Very soluble in water (1:0.9) and very soluble in alcohol. ACTION AND USES: Practically identical with those of potassium hydroxide. _*Liquor Sodii Hydroxidi (Liq. Sod. Hydrox.), Solution of Sodium Hydroxide, U.S.P._ (Liquor Sodae, Solution of Soda).--NaOH (about 5%) in water. DOSAGE: 1 Cc. or 15 minims (U.S.P.). =Sodii Hypophosphis (Sod. Hypophos.), Sodium Hypophosphite, U.S.P.=--NaH{2}PO{2} + H{2}O. Colorless plates or white powder, odorless and having a saline taste. Freely soluble in water (1:1) and soluble in alcohol. ACTION AND USES: The hypophosphites have been prescribed as "tonics," but all reliable evidence indicates that they are inert. DOSAGE: 1 Gm. or 15 grains (U.S.P.). _Elixir Sodii Hypophosphitis (Elix. Sod. Hypophos.), Elixir of Sodium Hypophosphite, N.F._--Sodium hypophosphite (3.5%), hypophosphorous acid (0.4%), and aromatic elixir. Absolute alcohol content about 21 per cent. USES: Objectionable alcoholic preparation of an inactive drug. DOSAGE: 4 Cc. or 1 fluidrachm (N.F.). _Syrupus Sodii Hypophosphitis (Syr. Sod. Hypophos.), Syrup of Sodium Hypophosphite, N.F._--Sodium hypophosphite (3.5%), and hypophosphorous acid (0.2%) in syrup. DOSAGE: 4 Cc. or 1 fluidrachm (N.F.). =Sodii Indigotindisulphonas (Sod. Indigotin.), Sodium Indigotindisulphonate, U.S.P.= (Indigo Carmine). Blue powder or dark purple paste. Sparingly soluble in water and almost insoluble in alcohol. ACTION AND USES: Coloring agent. =*Sodii Iodidum (Sod. Iod.), Sodium Iodide, U.S.P.=--NaI.