Lars,
It could be a risk vs. benefit game. A lot may (?) depend on what type of silver you are drinking(?) but as a rule, silver can be toxic and accumulates in many areas of the body. Silver Ion suspension may(?) be safer than the colloidal type. I was almost "conned" into trying colloidal trace minerals years ago -- there is really no need for "extra" trace minerals like gold, silver, etc and too much is toxic.
The blue skin discoloration from long-term use Fissy spoke about is argyria and is irreversible.

It can certainly give you an idea of how silver can permanently build up in one's body.
Of course, topical silver nitrate and other medically-supervised short-term forms would be an exception.
If it were me I'd at least be asking my doctor tomorrow about the stuff!