A black draught was a saline aperient mixture used, along with a blue pill

Blue pill

In medicine, the blue pill, also called the pilula hydrargyri, was a remedy prescribed for various ailments, particularly constipation. It contained 1/3 elemental mercury by weight, mixed with marshmallow, honey of rose, liquorice, glycerin, and inert ingredients to form pills of about 48 grains in...

, as a purgative in the 19th century and well into the early part of the 20th century, with veterinarians prescribing these to constipated cattle and horses.

Mrs. Beeton's Book of Household Management has this recipe for a black draught:

2587. The Common Black Draught.-- Infusion of senna

Senna (genus)

Senna , the sennas, is a large genus of flowering plants in the family Fabaceae, subfamily Caesalpinioideae. This diverse genus is native throughout the tropics, with a small number of species reaching into temperate regions. The number of species is usually estimated to be about 260, but some...

 10 drachms; epsom salt

Magnesium sulfate

Magnesium sulfate is a chemical compound containing magnesium, sulfur and oxygen, with the formula MgSO4. It is often encountered as the heptahydrate epsomite , commonly called Epsom salt, from the town of Epsom in Surrey, England, where the salt was distilled from the springs that arise where the...

s 10 drachms; tincture

Tincture

A tincture is an alcoholic extract or solution of a non-volatile substance . To qualify as a tincture, the alcoholic extract is to have an ethanol percentage of at least 40-60%...

 of senna, compound tincture of cardamums

Cardamom

Cardamom refers to several plants of the genera Elettaria and Amomum in the ginger family Zingiberaceae. Both genera are native to India and Bhutan; they are recognised by their small seed pod, triangular in cross-section and spindle-shaped, with a thin papery outer shell and small black seeds...

, compound spirit of lavender

Lavender

The lavenders are a genus of 39 species of flowering plants in the mint family, Lamiaceae. An Old World genus, distributed from Macaronesia across Africa, the Mediterranean, South-West Asia, Arabia, Western Iran and South-East India...

, of each 1 drachm. Families who make black draught in quantity, and wish to preserve it for some time2 drachms of spirits of hartshorn

Ammonium bicarbonate

Ammonium bicarbonate, a compound with formulaNH4, also called bicarbonate of ammonia, ammonium hydrogen carbonate, hartshorn, AmBic or powdered baking ammonia, is the bicarbonate salt of ammonia....

 to each pint of the strained mixture, the use of this drug being to prevent its becoming mouldy

Mold

Molds are fungi that grow in the form of multicellular filaments called hyphae. Molds are not considered to be microbes but microscopic fungi that grow as single cells called yeasts...

 or decomposed. A simpler and equally efficacious form of black draught is made by infusing 1/2 oz. of Alexandrian senna, 3 oz. of Epsom salts

Magnesium sulfate

Magnesium sulfate is a chemical compound containing magnesium, sulfur and oxygen, with the formula MgSO4. It is often encountered as the heptahydrate epsomite , commonly called Epsom salt, from the town of Epsom in Surrey, England, where the salt was distilled from the springs that arise where the...

, and 2 drachms of bruised ginger

Ginger

Ginger is the rhizome of the plant Zingiber officinale, consumed as a delicacy, medicine, or spice. It lends its name to its genus and family . Other notable members of this plant family are turmeric, cardamom, and galangal....

 and coriander

Coriander

Coriander is an annual herb in the family Apiaceae. Coriander is native to southern Europe and North Africa to southwestern Asia. It is a soft, hairless plant growing to tall. The leaves are variable in shape, broadly lobed at the base of the plant, and slender and feathery higher on the...

-seeds, for several hours in a pint of boiling water, straining the liquor, and adding either 2 drachms of sal-volatile

Ammonium carbonate

Ammonium carbonate is a commercial salt with the chemical formula 2CO3. It is used when crushed as a smelling salt. It can be crushed when needed in order to revive someone who has fainted...

 or spirits of hartshorn to the whole, and giving 3 tablespoonfuls for a dose to an adult.

'Black Draught' is also the name of a once-common commercial liquid syrup laxative, sold since the late 19th century, a cathartic medicine composed of a blend of senna

Senna (genus)

Senna , the sennas, is a large genus of flowering plants in the family Fabaceae, subfamily Caesalpinioideae. This diverse genus is native throughout the tropics, with a small number of species reaching into temperate regions. The number of species is usually estimated to be about 260, but some...

 and magnesia. Much like castor oil

Castor oil

Castor oil is a vegetable oil obtained from the castor bean . Castor oil is a colorless to very pale yellow liquid with mild or no odor or taste. Its boiling point is and its density is 961 kg/m3...

, it was a commonly used folk remedy for many ailments.

A musical jingle for the product was sung by a very young Dolly Parton

Dolly Parton

Dolly Rebecca Parton is an American singer-songwriter, author, multi-instrumentalist, actress and philanthropist, best known for her work in country music. Dolly Parton has appeared in movies like 9 to 5, The Best Little Whorehouse in Texas, Steel Magnolias and Straight Talk...

:
Smile from the inside out
smile from the inside out
Black Draught makes you smile from the inside out.