MEADOW SAFFRON.—­See Belladonna.

LAUDANUM.—­See Opium.

LUNAR CAUSTIC.—­See Silver.

LOBELIA.—­Indian Poke.—­Symptoms:  Excessive vomiting and purging, pains in the bowels, contraction of the pupils, delirium, coma, and convulsions.  Treatment:  Mustard over the stomach, and brandy and ammonia.

MERCURY.—­CORROSIVE SUBLIMATE (bug poisons frequently contain this poison), RED PRECIPITATE, CHINESE OR ENGLISH VERMILLION.—­Symptoms:  Acrid, metallic taste in the mouth, immediate constriction and burning in the throat, with anxiety and tearing pains in both stomach and bowels, sickness, and vomiting of various colored fluids, and sometimes bloody and profuse diarrhoea, with difficulty and pain in urinating; pulse quick, small and hard; faint sensations, great debility, difficult breathing, cramps, cold sweats, syncope and convulsions.  Treatment:  If vomiting does not already exist, emetics must be given immediately—­albumen of eggs in continuous large doses, and infusion of catechu afterwards, sweet milk, mixtures of flour and water in successive cupfuls, and to check excessive salivation put a half ounce of chlorate of potash in a tumbler of water, and use freely as a gargle, and swallow a tablespoonful every hour or two.

MONKSHOOD.—­See Arnica.

MORPHINE.—­See Opium.

NITRATE OF SILVER (LUNAR CAUSTIC.)—­Symptoms:  Intense pain and vomiting and purging of blood; mucus and shreds of mucus membranes; and if these stand they become dark.  Treatment:  Give freely of a solution of common salt in water, which decomposes the poison, and afterwards flax-seed or elm bark tea, and after a while a dose of castor oil.

NUX VOMICA.—­See Strychnine.

OPIUM AND ALL ITS PREPARATIONS—­MORPHINE, LAUDANUM, PAREGORIC, ETC.—­Symptoms:  Giddiness, drowsiness, increasing to stupor, and insensibility; pulse usually, at first, quirk and irregular, and breathing hurried, and afterwards pulse slow and feeble, and respiration slow and noisy; the pupils are contracted and the eyes and face congested, and later, as death approaches, the extremities become cold, the surface is covered with cold, clammy perspiration, and the sphincters relax.  The effects of opium and its preparations, in poisonous doses, appear in from a half to two hours from its administration.  Treatment:  Empty the stomach immediately with an emetic or with the stomach pump.  Then give very strong coffee without milk; put mustard plasters on the wrist and ankles; use the cold douche to the head and chest, and if the patient is cold and sinking give brandy, or whisky and ammonia.  Belladonna is thought by many to counteract the poisonous effects of opium, and may be given in doses of half to a teaspoonful of the tincture, or two grains of the extract, every twenty minutes, until some effect is observed in causing the pupils to expand.  Use warmth and friction, and if possible prevent sleep for some hours, for which purpose the patient should be walked about between two persons, and if necessary a bunch of switches may be freely used.  Finally, as a last resort, use artificial respiration, and a persistance in it will sometimes be rewarded with success in apparently hopeless cases.  Galvanism should also be tried.  OXALIC ACID.—­See Acids.