Lethal Dose Of Tylenol Would Mixing 12000 Mg Of Tylenol Along With 100 Mg Of Flexril And 750 Mg Tramadol Be Fatal?

Would mixing 12000 mg of tylenol along with 100 mg of flexril and 750 mg tramadol be fatal? - lethal dose of tylenol

And how long would it feel to? Since the lethal dose to be effective?