Yes, there can be interactions between Tylenol and certain medications. In this case, it is important to be cautious when giving Tylenol to your mother while she is taking Sintrom. It is recommended to avoid giving her more than 2 grams of Tylenol per day, which would be equivalent to 4 tablets of 500mg each. If giving her more Tylenol is necessary, it may be a good idea to monitor her blood levels to ensure she remains within the therapeutic range. If you have any further questions or concerns, it is always best to consult with a healthcare professional.