It doesn't actually send the medicine to any particular place. The chemicals get absorbed through the digestive system and travel throughout the body via the blood.
If you take glucosamine, the blood will take it to all parts of your body and where a joint is short of this it will be absorbed by the joint lining. While glucosamine is fairly safe to take you should still see a doctor first.
Because medicines travel all though your body it usually also effects organs/tissue other than the target problem, known as side effects. Thus, you should never take them if you're not sure of the side effects. Never buy over the counter medicine except from pharmacies which have a qualified pharmacist in attendance so you can ask questions.



