Is it safe to use listerine after using the sensodyne pronamel gentle whitening toothpaste?

Yes. But you should rinse first and then use the toothpaste.
Yes. It is fine to use Listerine after using Sensodyne proenamel gentle whitening toothpaste.
Should be. Should be okay. Remember, listerine may have up to 19% alcohol. This combined with the toothpaste is a lot on your teeth and tissues. Just try a little at a time. Use your good judgement.
Yes, it is safe. Yes, you may use listerine mouthwash after using Sensodyne pronamel gentle whitening toothpaste. Sensodyne is safe to use during any tooth-whitening treatment.