Does the cyanide in cyanide gold selection refer to pharmaceuticals?

No, the cyanide used in cyanide gold extraction is not a pharmaceutical.

Cyanide in gold extraction: This is a chemical compound, typically sodium cyanide or potassium cyanide, used to dissolve gold from its ore. It's a highly toxic substance and requires strict handling and disposal procedures.

Cyanide in pharmaceuticals: There is no legitimate pharmaceutical use of cyanide. Any mention of cyanide in a pharmaceutical context would likely be incorrect or related to poisoning incidents.

It's important to distinguish between these two completely different uses of cyanide.