Lidocaine Hydrochloride with Preservative Injection USP is a 2% local anesthetic solution formulated at 20 mg/mL for dependable infiltration and nerve block anesthesia. Each mL contains methylparaben 1 mg as a preservative, with hydrochloric acid and/or sodium hydroxide for pH adjustment in sterile water for injection. Available in a 50 mL vial or 10 x 20 mL pack, it is suitable for use as directed by a licensed professional. DIN 02422026; prescription required in Canada.