Difflam Sore Throat Rinse - Effectively reduces pain and inflammation in the throat. 200ml mouth rinse. Contains Benzydamine Hydrochloride For painful and inflamed sore throats. Gargle or rinse. Not suitable for use in children aged 12 years and under. Difflam Sore Throat Rinse is different to most other rinses on the market. Rather than numbing the pain with a anaesthetic, Difflam uses an anti-inflammatory drug similar to Ibuprofen to reduce the swelling and pain.