Use the dropper that comes with the medication to measure out the prescribed amount. If you have any questions, consult your doctor or pharmacist. Your condition will not improve any faster, and your risk of side effects will increase. Keep all drugs away from reach of children and pets. Tell your doctor right away if any of these rare but seriouspersistent heartburn, mental/mood changes (such as anxiety, agitation, confusion), shaking, severe stomach/abdominal pain. A very serious allergic reaction rarely occurs. Talk to your doctor about using doxepin safely. Limit alcoholic beverages. It may need time for the medicine to help.