An unusual use for a credit card. This home remedy will help with bee stings. Remove the stinger by scraping the area with a credit card; apply a baking soda paste as a poultice. For an allergic reaction, administer a dosage of Benadryl (1 mg/lb) every six hours. Benadryl comes in 25 mg capsules or as a liquid.Its a good idea to ask your vet what the exact dosage would be for your dog or cat and post it prominently in the kitchen — just in case.