Synthol

Synthol is a French liquid medical-product brand whose identity has shifted considerably since its introduction in 1920. It was developed by Maurice Bunau-Varilla, a prominent newspaper publisher, and was initially promoted as a broadly useful tonic with cure-all-style claims. Over time, the brand became principally associated with a mouthwash sold in France, while also being offered in topical formats such as a gel and spray intended for muscular pain. The product's historical formulation included chloral hydrate, menthol, veratrol, resorcinol, and salicylic acid. Its traditional mouthwash presentation was recognizable for a distinctive black carton. The brand was later acquired by GlaxoSmithKline, placing it within the portfolio of a major international healthcare company, although the available reference material does not specify the acquisition date or the precise corporate structure through which it was marketed. Synthol experienced a supply interruption during 2014 and 2015. It returned to French pharmacies in June 2016 after reformulation. The revised formula retained the other cited ingredients but excluded chloral hydrate, which had become prohibited. The product's indication was also changed: the wording identifying it as a mouthwash, or “bain de bouche,” was removed. This marked a regulatory and positioning transition away from the product's long-standing mouthwash identity, even though the Synthol name continued to be used. The reformulated product was associated with additional topical and antiseptic uses, including endorsement of Synthol gel for umbilical-cord antisepsis. Separately, a similarly named product, SyntholKiné, was launched by Glaxo in 2015. SyntholKiné is described as unrelated to the original Synthol brand and should not be treated as the same product line without further evidence. Synthol is therefore best understood as a long-running French healthcare and personal-care brand rather than as a single unchanging formulation. Its history illustrates how a brand can move from patent-medicine-style tonic marketing to a recognizable pharmacy product, then adapt to ingredient restrictions, supply disruption, and changes in approved or communicated use. Publicly available reference material confirms its French availability and major formulation milestones, but does not establish a current corporate website, detailed international distribution, current leadership, sales, or financial performance.

Synthol was introduced in France in 1920 by Maurice Bunau-Varilla. Bunau-Varilla was a prominent newspaper publisher who developed and promoted the product as a tonic. Early marketing presented Synthol in broad, cure-all terms, reflecting the commercial environment of early twentieth-century patent and medicinal tonics. The brand's identity changed over subsequent decades. Rather than remaining primarily a general tonic, Synthol became associated with a liquid mouthwash sold through the French market. Its historical formulation contained chloral hydrate, menthol, veratrol, resorcinol, and salicylic acid. The product was commonly recognized by its black carton and was also made available in topical forms, including a gel and spray marketed for muscular pain. These formats broadened the brand beyond oral care and connected it with pharmacy-based relief products. At an unspecified point in its history, Synthol was acquired by GlaxoSmithKline. The available reference material does not provide a date for the acquisition or identify the exact operating subsidiary responsible for the brand. The acquisition nevertheless placed a historically French product within the portfolio of a large healthcare group. A significant transition occurred during 2014–2015, when Synthol suffered a supply rupture. The product subsequently returned to French pharmacies in June 2016. Its return involved a reformulated composition: chloral hydrate was removed because the ingredient had become banned. The wording identifying the product as a mouthwash, “bain de bouche,” was also removed from its indication. Consequently, the post-2016 product should not be treated as chemically or regulatorily identical to the earlier mouthwash formulation. The reformulated Synthol range was associated with new or expanded uses. One cited example is the endorsement of Synthol gel as an antiseptic for the umbilical cord. This illustrates the brand's continued movement toward practical topical healthcare applications rather than reliance solely on its historical oral-care positioning. In 2015, Glaxo launched a product called SyntholKiné. Despite the similar name, it is described as unrelated to the original Synthol brand. The distinction is important when tracing the brand's history, product portfolio, or public references, because SyntholKiné should not automatically be counted as a reformulation or extension of the original Synthol product. Synthol's documented history is therefore one of repeated repositioning: from a broadly advertised tonic, to a recognizable French mouthwash, to a broader topical medical-product brand affected by ingredient regulation and supply constraints. The available material confirms its continued presence in France after its 2016 return, but does not provide sufficient information about current ownership arrangements beyond the historical association with GlaxoSmithKline, current markets outside France, present-day leadership, or financial performance.

1. 2016Reformulated Synthol returns to pharmacies

   Synthol returns to French pharmacies in June with chloral hydrate removed and the mouthwash indication deleted.

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2. 2015SyntholKiné is launched

   Glaxo launches the similarly named SyntholKiné product, which is described as unrelated to the original Synthol brand.

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3. 2014Supply interruption begins

   Synthol undergoes a supply rupture that continues into 2015.

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4. 1920Synthol is introduced in France

   Maurice Bunau-Varilla develops Synthol and promotes it as a broadly useful tonic.

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A French pharmacy-oriented medical and personal-care brand historically centered on mouthwash and later extended to topical pain-relief and antiseptic uses.

• Synthol mouthwashmouthwash

  The product format most strongly associated with Synthol's mature brand identity. Historically sold in a distinctive black carton, it used a liquid formulation containing chloral hydrate, menthol, veratrol, resorcinol, and salicylic acid. After its return to French pharmacies in 2016, chloral hydrate was removed and the mouthwash indication was no longer retained.

• Synthol geltopical pain-relief and antiseptic gel

  A topical Synthol format associated with relief of muscular pain and later with antiseptic use. Reference material specifically notes endorsement of the reformulated gel for umbilical-cord antisepsis, showing the product's movement beyond the brand's historic mouthwash positioning.

• Synthol spraytopical pain-relief spray

  A topical spray format offered under the Synthol name for muscular pain. The available material confirms the format and general use but does not provide a launch date, detailed ingredients, or current availability.

• Synthol tonictonic1920

  The original form of the brand, developed in 1920 and promoted by Maurice Bunau-Varilla as a general-purpose tonic. Historical marketing presented it as a cure-all product, unlike the later pharmacy positioning centered on mouthwash and topical preparations.

• 2016Reformulation following chloral hydrate prohibitionGeneration change

  After a supply interruption in 2014–2015, Synthol was prepared for return to French pharmacies while its former chloral-hydrate-based formula was no longer permissible.

  What changed. The formula was changed to remove chloral hydrate, and the indication describing the product as a mouthwash was removed.

  Aftermath. The reformulated product returned to French pharmacies in June 2016 and was associated with additional topical uses, including umbilical-cord antisepsis for Synthol gel.

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• 2015Launch of SyntholKinéProduct launch

  Glaxo introduced a product with a name similar to Synthol during the period surrounding the original brand's supply disruption.

  What changed. Glaxo launched SyntholKiné as a separate product.

  Aftermath. SyntholKiné is identified as unrelated to the original Synthol brand, so the two products should be distinguished in brand and product histories.

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• 2016Synthol returns to French pharmacies after reformulation

  The product returned in June 2016 with a revised composition that excluded chloral hydrate and no longer carried the mouthwash indication.

  Product generationRegulation
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• 2015Glaxo launches unrelated SyntholKiné product

  Glaxo launched SyntholKiné, a similarly named but unrelated product, creating an important distinction between that product and the original Synthol brand.

  Product launch
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• 2014Synthol supply interruption affects availability in France

  Synthol experienced a rupture in supply during 2014–2015, temporarily limiting its availability before a later return to French pharmacies.

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1. Synthol (mouthwash)