General Nursing Interventions for Oral Pain Relief: Careful, regular, frequent mouth care Oral agents such as Lidocaine 2% viscous, Benadryl elixir, Antacid, & Kaopectate, Acetaminophen Topical agents such as coating agents Swishing agents providing topical & anti-inflammatory action analgesia Iced water or a dish of crushed ice (with spoon).