Lidocaine Hydrochloride Gel may be left open until the use-by date, but it is generally recommended that it be used as soon as possible. Lidocaine Hydrochloride Gel has local anesthetic and lubricating properties and is indicated for use in patients who require local anesthesia for transurethral examinations and treatments. The drug should be contraindicated in persons with a history of lidocaine allergy, with caution in persons with high blood pressure and in persons with trauma to the cavity. The drug is usually valid for 24 hours and can usually be left open until the expiration date, but it is recommended that the drug be administered as soon as possible. Adverse reactions such as increased blood pressure and rapid pulse may occasionally occur during treatment with the drug, but usually return to normal on their own after surgery. Specific medication should be administered under the guidance of a specialist, and should not be used without authorization.