My boyfriend has gotten a distorted sense of taste due to the use of Perio RX (periodex). Nothing seems to taste right, sweet is bitter, salty doesn't have a salty taste, and most all foods have just a bitter or not normal taste. He hasn't been able to eat a full meal in about 2 weeks. He used the mouthwash for about a week but stopped because of the distored taste he now has. It has been 4 days since he completely stopped using the mouthwash but he has not noticed any improvement what so ever. Is there anything we can do to help correct this?