Fuciderm Gel Uses Fuciderm gel is used for the topical treatment of certain skin diseases such as wet eczema (acute moist dermatitis) which can occur in isolated patches on the body or in skin folds. Wet eczema is often made worse by the dog scratching or licking the affected area because of itching or pain. The skin problem may be associated with flea allergy and your veterinary surgeon may treat your dog for fleas at the same time. Fuciderm gel contains a well known antibiotic which helps kill the bacteria and a corticosteroid anti-inflammatory which will help relieve the itching and inflammation.