Hello, Highly unlinkely that your schizophrenic medication can cause any white patches on the tongue. Secondly, if it is from the tooth it would result in a traumatic ulcer which is usually reddish in colour. A clinical picture of the lesion would help in better diagnosis. The white patch on tongue could be an isolated presentation, which could be geographic tongue, leukoplakia, candidiasis etc.. again a clinical examination is needed.

Hello! May be because of sharp tooth edges, friction can cause.

Hello Please share the picture

Hi, Visit a dentist and get an x-ray for the infected tooth. Get the tooth treated as soon as possible.

Please  share  pic