Gold enters into the composition of a large number of medicines for various diseases. Pure leaf-gold is used which should be free from admixture of copper and silver, of a red colour when exposed to heat, and of saffron colour when rubbed on touchstone.

Processing of Gold
Gold is purified by heating its leaves and cooling them alternately with Kanjika, oil, cow"s urine, buttermilk and a decoction of horsegram. Gold is reduced to powder by being rubbed with mercury and exposed to heat in a covered crucible with the addition of sulphur. 2 parts of mercury and 1 of leaf-gold are rubbed together into a mass with lemon juice and placed in a crucible with 3 parts of sulphur. The crucible is then covered and exposed to heat. This process of mixing the gold with mercury and exposing to heat is repeated 14 times, when the gold completely loses its metallic character. Gold thus prepared for medicinal use is considered a valuable tonic and alterative.

Benefits of Gold
Gold is said to increase strength and beauty, to improve the intellect and memory, to clear the voice and to increase the sexual powers. It is used in fever, consumption, insanity, diseases of the nervous system and urinary organs, impotence, etc.

Dose of Gold in Medicine
Gold is much used as an alterative tonic. Prepared gold in doses of 2 grains daily with the addition of honey, ghee and emblic myrobalan, or root of Acorus Calamus (vacha) is recommended to be taken for a lengthened period. It is also given to infants under an impression that it will impart strength and beauty to their frames. The following composition is recommended for them. Take powdered gold, root of Acorus Calamus (vacha) and Aplotaxis awriculata (kushtha), chebulic myrobalans, and leaves of Herpestes Monniera (brimhi) equal parts, powder and mix. Dose should be 2 grains with honey and ghee. It is recommended to be given to feeble infants a few days after birth.

Jayamangala Rasa: Take mercury obtained by sublimation, cinnabar, sulphur, borax, prepared copper, tin, iron pyrites, rock salt, black pepper, prepared iron and silver, each 1 part, prepared gold 2 parts, powder them well, mix and soak the mixture 3 times respectively in the juice of datura leaves, and leaves of Nyctanthes Arbor-tristis (sephalika), in the decoction of dasamula and chiretta. Divide the mass into 4 grain pills. They are taken with cumin seed powder and honey. Dose should be 1 to 2 grains. This medicine is used in old chronic fevers of all sorts and is said to be a powerful tonic and alterative, that may be administered with suitable adjuncts in many diseases.

Mriganka Rasa: Take mercury 1 part, prepared gold 1 part, sulphur and pearls each 2 parts, borax one-fourth part, rub them together and beat into a ball with Kanjika. This is dried, enclosed in an earthen crucible and exposed to heat within a pot of rock salt in the manner of a hot sand-bath for 12 hours. When cool the ball is taken out from the crucible and reduced to powder. It is administered in doses of 1 to 4 grains with about a scruple of black pepper in phthisis. Two other preparations used in this disease, and called Pottali Hemagarbha Rasa and Ratnagarbha Pottali Rasa, respectively, are similar in composition to the Mriganka Rasa.

Suvarna Parpati: Take mercury 8 tolas, gold 1 tola, rub them together and then add sulphur 8 tolas and mix. Melt the mixture over the fire in an iron ladle smeared with ghee, and press the melted fluid between cow dung balls enclosed in plantain leaves in the manner described under Rasa Parpati, so as to make thin round disks of it. Dose should be 2 grains, gradually increased to 10 grains in the course of 21 days, to be again gradually reduced to the original dose of 2 grains in another 3 weeks.

Makaradhwaja: To prepare it, take leaf-gold 1 tola, mercury 8 tolas, beat into a mass, then add sulphur 16 tolas, and rub together till the mass becomes black. Flub this mass repeatedly with the juice of the red cotton flower and of Aloe Indica and dry. Now take a bottle with a flat bottom, wrap it with layers of cloth and clay to strengthen it, and dry. Place the mixture of gold, mercury and sulphur at the bottom of the bottle, insert it in a sand-bath up to its neck and cover the mouth lightly with a piece of chalk. Apply heat gently at first. When the process of sublimation commences the heat should be increased, and the chalk-stopper removed. The sulphur now burns with its characteristic blue flame at the mouth of the bottle and a red sublimate collects below its neck. The narrow neck of the bottle is apt to be closed with sulphureous deposits and when there is this tendency, it should be cleared with an iron rod. When done, the bottle is broken and the sublimate is extracted from its neck in the shape of shining dark red scales. In this process the sulphur and mercury are sublimed in the form of red sulphide, and the gold remains at the bottom of the bottle. The latter may be used again in the preparation of Makaradhwaja or converted into powdered gold. Makaradhwaja is administered in doses of 1 grain daily with honey or other suitable adjuncts in nervous debility, weakness of brain from excessive mental labour, habitual costiveness, general debility, female complaints after delivery, spermatorrhoea, etc.

Chandrodaya Makaradhwaja: When Makaradhwaja is administered as an aphrodisiac, it is usual to mix it with some stimulant drugs, the resulting preparation being called Chandrodaya Makaradhwaja. Thus take Makaradhwaja 1 part, camphor, nutmegs, black pepper, and cloves, each 4 parts, musk one-sixteenth part, mix together and make into pills about 10 grains each. These pills are enclosed or wrapped in betel leaves and chewed. Along with this medicine a generous diet consisting of meat, ghee, milk, pulses, etc., should be taken. It is used in nervous debility, impotence, premature old age etc.