What is ivermectin made out of?

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Accepted Answer

Ivermectin is a naturally‑derived drug that comes from a soil‑bacteria fermentation process.
Here’s a quick rundown of what makes it up:

What you’re looking at	Details
Origin	The core of ivermectin is produced by the bacterium Streptomyces avermitilis, which lives in soil. The bacterium naturally synthesises a group of related compounds called “avermectins.”
Active ingredient	Ivermectin itself is a mixture of two very similar macrocyclic lactone compounds (named avermectin B1a and avermectin B1b). These two isomers differ only in the orientation of a few atoms, but together they give the drug its activity.
Chemical formula	C₄₁H₆₈O₁₄ – that’s the sum of all the atoms in the active drug. It’s a large, complex structure: a 16‑membered macrocycle (a big ring) that includes a lactone (an ester ring) and a sugar‑like side chain.
How it’s made	1. Fermentation – S. avermitilis is grown in a nutrient medium. 2. Extraction & purification – The bacterial broth is processed to isolate the avermectin mixture. 3. Separation – The two isomers (B1a and B1b) are separated or kept together depending on the intended formulation. 4. Formulation – The active drug is blended with excipients (inactive ingredients such as fillers, binders, lubricants, etc.) to make tablets, creams, or injectables.

Key points to remember

Natural source, not “synthetic” – although it is a complex molecule, ivermectin originates from a natural microbial metabolite.
Mixture of isomers – most commercial ivermectin preparations contain both B1a and B1b isomers, usually in roughly a 1:1 ratio.
Excipients – In the final pharmaceutical product, ivermectin is combined with other substances to make it stable, swallowable, or able to be applied to the skin, but those excipients don’t contribute to the drug’s activity.

So, in short, ivermectin is made from a natural macrocyclic lactone produced by a soil bacterium, purified into two very similar compounds, and then formulated with standard pharmaceutical excipients for medical use.

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What is ivermectin made out of?

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