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Many folks eat high lysine foods prior to or during a cold sore event, and avoid high arginine foods. For many folks, healing cold sores fast has been as simple as taking 1,000 milligrams to 3,000 milligrams of lysine in capsule supplements during an outbreak. High lysine foods to eat are most meats and dairy products.
Diclofenac is an anti-inflammatory, sort of a souped-up Ibuprofen. So if you're looking for control of the pain of the cold-sore, it may help. But it's not going to help you with shortening the duration of the cold sore or the area that it spreads to.or that you need a prescription anti-viral, Zovirax (acyclovir), because cold sores are caused by the Herpes virus (HSV-1). Alternatively, you could get Abreva which is a non-prescription ointment that will also shorten the cold sore's lifespan.