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Medically reviewed by Last updated on Feb 27, 2023.

Excipient (pharmacologically inactive substance)

What is it?

Silicone is a polymer of organic silicon oxides, which may be a liquid, gel, or solid, depending on how extensively the polymerization of the silicone. Silicone was formerly widely used in surgical implants, in intracorporeal tubes to conduct fluids, as dental impression material, as a grease or sealing substance, as a coating on the inside of glass vessels for blood collection, and in various ophthalmology procedures. Silicone is still used for breast implants, but sterile sodium solution is also now frequently used.[1]


  1. Silicone. Accessed March 2, 2015 at

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.