Lidocaine hydrochloride jelly is a topical anesthetic used to prevent and control pain, according to Drugs.com. Doctors specifically use it during procedures involving the urethra, to treat pain associated with urethritis, and as a lubricant and anesthetic during intubation, or insertion of a breathing tube.
Lidocaine hydrochloride jelly may cause adverse reactions that are usually related to rapid absorption, excessive dosage or patient intolerance, states Drugs.com. Potential reactions include dizziness, lightheadedness, vision changes, vomiting and tremors. Confusion, nervousness, slow heart rate, low blood pressure and breathing problems may also occur. Allergic reaction to lidocaine jelly is characterized by symptoms such as skin lesions, hives and swelling.