Before taking ivermectin,
tell your doctor and pharmacist if you are allergic to ivermectin or any other medications.
tell your doctor and pharmacist what other prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Be sure to mention if you are taking medications for anxiety, mental illness or seizures; muscle relaxants; sedatives; sleeping pills; or tranquilizers. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
tell your doctor if you have or have ever had meningitis, human African trypanosomiasis (African sleeping sickness; an infection that is spread by the bite of the tsetse fly in certain African countries), or conditions that affect your immune system, such as human immunodeficiency virus (HIV).
tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant during your treatment with ivermectin, call your doctor.
ask your doctor about the safe use of alcoholic beverages while you are taking ivermectin.
if you are taking ivermectin for onchocerciasis, you should know that you may experience dizziness, lightheadedness, and fainting when you get up too quickly from a lying position. To avoid this problem, get out of bed slowly, resting your feet on the floor for a few minutes before standing up.
if you are taking ivermectin for strongyloidiasis and have had loiasis (Loa loa infection with a type of worm that causes skin and eye problems) or if you have ever lived in or traveled to areas of West or Central Africa where loiasis is common, you should know that you may have a serious reaction. Call your doctor immediately if you experience blurred vision, head or neck pain, seizures or difficulty walking or standing.