How long will it take to get a one time dose of 150mg of zantac out of your system after taking it?

Not monitored: Zantac is not a substance of abuse and would not need to be tracked for elimination from the body. Most of it would be out of your system in a day or so. Wish you good health! - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if you have sex.