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Is it safe to use magnets with a metal joint replacement?

Q) I have osteoarthritis in most joints and have had one hip and one knee replaced, but provided I do the majority of my physical activities before 2 pm I can cope with a few painkillers. Is it safe to use a magnetic device? I read they shouldn't be used by anyone with a metal prosthesis. Would I benefit?
Dorothy Pirkis, Storrington, West Sussex (Autumn 2005)

A) There's some evidence of benefit for wrist-mounted magnets in arthritis, but it's not very strong. Although generally safe, don't use any magnet therapy products if either you or your partner have a heart pacemaker, hearing implant or any other implanted electronic device as the weak magnetic field can affect the way they work. Most joint replacements are made from non-ferrous metals so there's not a problem using them in this circumstance.


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