Mepivacaine hydrochloride is related chemically and pharmacologically to the amide-type local anesthetics. Mepivacaine injection is used to cause numbness or loss of feeling and prevention of pain for patients having certain medical procedures. This medicine is to be given only by or under the direct supervision of your doctor. Allergic reactions to local anesthetics are often attributed to additives such as metabisulfite or methylparaben. True allergic reactions to amide local anesthetics are extremely rare but have been documented.