Benzocaine common preparations are compound benzocaine ointment, compound benzocaine gel, benzocaine containing tablets, chlorhexidine benzocaine containing tablets, with benzocaine can be pregnant, there is no clear contraindication pregnancy can not be used. 1. Compound benzocaine ointment is used for mild burns or scalds on small areas of the skin. Its adverse reactions are occasionally allergic reactions or skin irritation, etc. Contraindications are that it is forbidden for infants under 6 months, and those who are allergic to it. Note that this product is limited to the surface of the skin. 2. Compound benzocaine gel is used for recurrent oral ulcers and pain relief. Adverse reactions are transient local irritation in some patients, and may also cause shortness of breath, headache, dizziness and other methemoglobinemia symptoms, requiring prompt medical attention, contraindication is prohibited for those who are allergic to it. Note that this product should not be used continuously for more than 7 days. 3. Benzocaine tablets are used for pain caused by oral diseases, such as mouth ulcers. The adverse reaction of this product is occasional allergic reaction, contraindication is forbidden to those who are allergic to it. Do not eat or drink for 1 hour after administration. 4. Chlorhexidine benzocaine tablets are used for the treatment of tonsillitis and mouth ulcers. Its adverse reaction is occasionally seen oral mucosa superficial flaking or allergic reaction, contraindication is periodontitis and incisor filling patients, allergic to it is prohibited. Care should be taken to avoid contact with the eyes. The different dosage forms of benzocaine mentioned above are not contraindicated in pregnant women and pregnancy is usually possible after use. If you need to use benzocaine preparations during pregnancy or in preparation for pregnancy, apply them under the supervision of a physician, do not use them on your own to avoid adverse consequences.