Please do not give your patients colloidal silver. Please tell any patient who is taking colloidal silver internally to stop doing it.
Silver is a heavy metal. It is toxic to the nervous system and the damage can be irreversible. It can accumulate in the brain, spinal cord, bone marrow as well as in the organs. It can take years to clear out all the silver that gets deposited in the various spots around the body.
There are lots of really great topical and internal antibacterial and antifungal herbs you can use instead. Luggols iodine can be a great topical antibacterial (although not near mucous membranes). Silver is up there with mercury and should be avoided like the plague. Colloidal silver belongs back in medieval times. Not in the 21st century.
Taking internally and applying externally are two different things. The amount that is absorbed into the skin is a lot less than what is absorbed if taken internally. It's used in medicine for wound healing in silver embedded bandages - but it tends not to be absorbed into the body - rather it stays in the local tissues. It's known to impair leukocyte levels - and people with severe burns are monitored for their leukocyte levels and treatment stopped if their levels drop too low.
Most of the info about silver toxicity talks about liver failure, kidney failure as things to watch out for, and in the absence of irreversible organ damage that everything is "fine". However it's also acknowledged that people who end up with skin discolouration from taking silver for too long - the skin discolouration is permanent because the body can't get rid of the silver.
Have a read of this for a general overview - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3003978/
It’s a toxic metal. The research is around topical use for burns. As for using it internally there’s no research on it being safe, because it’s already known to be toxic and cause liver and kidney damage. The research shows it’s dangerous.
Metals are either in metallic form or ion form - and the ion form is the one that is more readily absorbed into the body. If a colloidal silver product has silver ions this is the more absorbable form of silver and is toxic. If it contains chunks of silver in metallic form, it’s not so well absorbed but the stomach acid could probably break it down to release the silver ions. Either way you end up with a heavy metal inside the body. There is no such thing as a high quality colloidal silver product that contains a safe form of silver. The only safe product is one that doesn’t have any silver - ionic or not. Silver ions (vs silver metal) are the more toxic form to humans. But ultimately both forms when ingested put a huge load on the liver and kidneys to be able to excrete them.