It is unlikely that taking a double dose of Tylenol once will lead to complications, unless you have liver health issues. If you experience similar symptoms again, you may want to consider using a pill organizer or keeping track of your medication schedule. Following the prescribed dosage and not exceeding the maximum daily intake of Tylenol should prevent any problems. If you have been prescribed this medication for pain relief, it is important to follow your doctor's instructions and use it as needed. If you continue to experience symptoms like dizziness, fatigue, abdominal pain, or nausea, it is advisable to consult a healthcare professional to rule out any complications related to your surgery.