[edit] Medicine
Finger stained by silver nitrateSilver salts have antiseptic properties. AgNO3 is sometimes dropped into newborn babies’ eyes at birth to prevent contraction of gonorrhoea or chlamydia from the mother. Eye infections and blindness of newborns is reduced by this method. This protection was first used by Credé in 1881 and is still in use.[4][5][6] Fused silver nitrate, shaped into sticks, was traditionally called “lunar caustic”. It is used as a cauterizing agent, for example to remove granulation tissue around a stoma. Dentists sometimes use silver nitrate infused swabs to heal oral ulcers. Silver nitrate is also used by some podiatrists to kill cells located in the nail bed.
The above is from Wikipedia. There are definite medical uses for silver, and in my research, I don’t remember any source coming out and saying that it’s worthless, or ineffective, just turns you blue if you ingest it. (Except for the claims that it cures 650 diseases, and regenerates whatever.) If the guy on Hannity is still using it, maybe it works for whatever he’s taking it for.