Call the Pharmacy and speak with the Pharmicist...it takes time to clear up an infection...call the Dentist and ask how long will it take to clear up his infection, and if it doesn't get better, go back to this Dentist and ASKS QUESTION'S!  I thought I had a bad root canal done, Praise The Lord it ended up being an infection around my crown in the gum, and I brush my teeth and rinse all the time...I am now on an antibotic which I started yesterday...hope your husband's infection clears up soon...