I suspect the link above would answer your questions.
Fluoride as used in drugs, is used as a carrier agent. The fluoride reduces the quantity of the active compound needed to do the job.
Illness and disease is the exposure to, and accumulation of, toxins, and\or nutritional deficiencies or imbalances in the body. Prescriptions, especially those that are manufactured with a carrier agent such as fluoride, act as metabolic process disruptors, interfering with the body's natural healing processes, adding to the toxic load, directly causing nutritional deficiencies and imbalances.
The active compound in the drug is manufactured intentionally to do the same... that is how they work, and why they almost always cause side effects.