Myospas D Tablet can cause mild side effects like nausea, dizziness, or drowsiness. Rarely, serious side effects such as stomach bleeding, liver problems, heart issues, or seizures can occur. Monitor symptoms and seek immediate medical help if severe side effects arise. Both medications are generally well-tolerated when used correctly. can cause mild side effects like nausea, dizziness, or drowsiness. Rarely, serious side effects such as stomach bleeding, liver problems, heart issues, or seizures can occur. Monitor symptoms and seek immediate medical help if severe side effects arise. Both medications are generally well-tolerated when used correctly.