..........In some cases, necrosis and haemorrhage of the gastrointestinal tract, liver damage and death may occur. Scarring of the gastrointestinal tract may occur in non-fatal cases.
Kidney injury and bleeding from injury may occur. There have occasionally been cases of accidental or suicidal poisonings by ingestion of known or unknown amounts of fluosilicate, for the most part, sodium fluosilicate, sometimes magnesium, zinc or other fluosilicates.
Fluoride causes severe loss of calcium in the blood, with symptoms appearing several hours later including painful and rigid muscle contractions of the limbs.
Cardiovascular collapse can occur and may cause death with increased heart rate
Mice given sodium hexafluosilicate exhibited toxic effects in the peripheral nerves, sensation, and in behaviour.
In rats, an oral dose administered intermittently for one month produced toxic effects in the kidney, ureter, and/or bladder, as well as musculoskeletal and biochemical effects.
But it’s safe and effective.