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Weight loss can occur while being on Dilantin (though not a widely reported side effect). You should consider discussing your symptoms with your treating doctor and go ahead with further evaluation to rule out any other cause for the weight loss. If indicated, you can be put on alternate medication after taking you off the Dilantin. Maintain diet rich in proteins. Consider being in regular monitoring and follow-up with your treating doctor and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest.
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