Tretinoin

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.Signs of bleeding like throwing up or coughing up blood; vomit that looks like coffee grounds; blood in the urine; black, red, or tarry stools; bleeding from the gums; abnormal vaginal bleeding; bruises without a cause or that get bigger; or bleeding you cannot stop.Signs of infection like fever, chills, very bad sore throat, ear or sinus pain, cough, more sputum or change in color of sputum, pain with passing urine, mouth sores, or wound that will not heal.Signs of lung or breathing problems like shortness of breath or other trouble breathing, cough, or fever.Signs of high or low blood pressure like very bad headache or dizziness, passing out, or change in eyesight.Weakness on 1 side of the body, trouble speaking or thinking, change in balance, drooping on one side of the face, or blurred eyesight.Change in hearing.Hearing loss.Swelling of belly.A heartbeat that does not feel normal.A burning, numbness, or tingling feeling that is not normal.Low mood (depression).Shortness of breath, a big weight gain, or swelling in the arms or legs.Feeling confused.Hallucinations (seeing or hearing things that are not there).Pale skin.