Liniment

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Sloan's Liniment, right, was once a popular over-the-counter drug. Herb Knudson's Surgical 11.jpg
Sloan's Liniment, right, was once a popular over-the-counter drug.

Liniment (from Latin : linere, meaning "to anoint"), also called embrocation and heat rub, is a medicated topical preparation for application to the skin. Some liniments have a viscosity similar to that of water; others are lotion or balm; still, others are in transdermal patches, soft solid sticks, and sprays. Liniment usually is rubbed into the skin, which the active ingredients penetrate.

Contents

Liniments are typically sold to relieve pain and stiffness, such as from muscular aches and strains, and arthritis. These are typically formulated from alcohol, acetone, or similar quickly evaporating solvents and contain counterirritant aromatic chemical compounds, such as methyl salicylate, benzoin resin, menthol, and capsaicin. They produce a feeling of warmth within the muscle of the area they are applied to, typically acting as rubefacients via a counterirritant effect.

Methyl salicylate, which is the analgesic ingredient in some heat rubs, can be toxic if used in excess. [1] Heating pads are also not recommended for use with heat rubs, because the added warmth may cause overabsorption of the active ingredients.

Notable liniments

An old bottle of AA Hyde Mentholatum Ointment Old bottle of Mentholatum.JPG
An old bottle of AA Hyde Mentholatum Ointment

Use on horses

A 1914 advertisement for "Antiphlogistine" Antiphlogistine.jpg
A 1914 advertisement for "Antiphlogistine"

Liniments are commonly used on horses following exercise, applied either by rubbing on full-strength, especially on the legs; or applied in a diluted form, usually added to a bucket of water and sponged on the body. They are used in hot weather to help cool down a horse after working, the alcohol cooling through rapid evaporation, and counterirritant oils dilating capillaries in the skin, increasing the amount of blood releasing heat from the body. [16]

Many horse liniment formulas in diluted form have been used on humans, though products for horses which contain DMSO are not suitable for human use, as DMSO carries the topical product into the bloodstream. [17] Horse liniment ingredients such as menthol, chloroxylenol, or iodine are also used in different formulas in products used by humans. [18]

Absorbine, a horse liniment product manufactured by W.F. Young, Inc., was reformulated for humans and marketed as Absorbine Jr. [19] The company also acquired other liniment brands including Bigeloil and RefreshMint. [20] The equine version of Absorbine is sometimes used by humans, [21] though, anecdotally, its benefits in humans may be because the smell of menthol releases serotonin, or due to a placebo effect. [19]

Earl Sloan was a US entrepreneur who made his initial fortune selling his father's horse liniment formula beginning in the period following the Civil War. Sloan's liniment with capsicum as a key ingredient was also marketed for human use. He later sold his company to the predecessor of Warner–Lambert, which was purchased in 2000 by Pfizer. [22] [23]

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<span class="mw-page-title-main">Menthol</span> Organic compound used as flavouring and analgesic

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<span class="mw-page-title-main">Methyl salicylate</span> Chemical compound

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A.B.C. Liniment was a patent medicine liniment sold between approximately 1880 to 1935 as a topical pain relieving agent. It was sold for relief of pain caused by various ailments, including lumbago, sciatica, neuralgia, rheumatism, and stiffness after exercise. It was named for its three primary ingredients, aconite, belladonna, and chloroform. There were numerous examples of poisoning from the mixture, resulting in at least one death.

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Olbas Oil is a remedy, of Swiss origin, for congestion in the chest and nose, some hayfever relief and also for muscle ache via massage. It is made from a mixture of several different essential oils and has been marketed since before 1916. The name is a contraction of Oleum Basileum, "oil from Basel".

<span class="mw-page-title-main">Fengyou essence</span> Chinese medicine

Fengyou Essence, also named Medicated Oil, is a type of Chinese patent medicine, usually in the form of an oily liquid with a light green color. It is derived from countries in Southeast Asia where the weather is warm and wet with the prevalence of mosquitoes because it serves a great deal in relieving itchiness. In China, it is sometimes called "panacea oil" as it is believed to alleviate the symptoms of many diseases ranging from coughing and rhinitis to the cold and flu.

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