The Salvarsan tube (or ampule) was used to store and dispense the drug Salvarsan (arsphenamine), which was the first effective treatment for syphilis in the early 20th century.

💊 Salvarsan and its Administration

• The Drug: Salvarsan (also known as "606") was a synthetic, arsenic-based compound discovered by Paul Ehrlich's laboratory. It was a revolutionary "magic bullet" because it targeted the syphilis-causing bacterium, Treponema pallidum, more effectively than the toxic, older mercury-based treatments.

• The Tube's Purpose: Salvarsan was distributed as a yellow, crystalline powder that was highly unstable and easily oxidized upon exposure to air, which would turn it into a toxic form. The sealed glass tube contained the drug under a vacuum or a nitrogen atmosphere to prevent this oxidation, ensuring its stability until the moment it was prepared for injection.

• Preparation for Injection: The powder had to be prepared immediately before administration:

  1. The powder was dissolved in a small amount of methyl alcohol (sometimes).

  2. It was then mixed with a large amount of distilled water (several hundred milliliters in earlier methods, or a smaller amount for the improved Neosalvarsan).

  3. For the original, highly acidic Salvarsan, caustic soda (sodium hydroxide) was added to neutralize the solution before injection. The subsequent drug, Neosalvarsan, was easier to prepare as it was more soluble in water and had a neutral reaction, simplifying the process.

• Administration: The prepared solution was typically administered via intravenous injection into a patient's arm vein or, earlier and more painfully, intramuscularly into the buttocks.

Salvarsan and its derivatives, like Neosalvarsan, were the standard treatment for syphilis until the introduction of penicillin in the 1940s.