Should I de-worm my baby?

Dear Doctor, My child is now eight months old and crawls around putting almost everything in his mouth. I think he is teething. My questions is, with all this dirt that he picks, is it wise to de-worm him? My sister says it is okay and says there is de-worming medicine available for babies in pharmacies but I’m not sure about it. What are the effects? Is it too soon?
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Dr. Rachna Pande