How should you take isoniazid?

Answer:
Do not take antacids that contain aluminum, such as Maalox, within 1 hour of taking isoniazid, as this may keep the medicine from working.
First answer by Gale Ency. of Medicine. Last edit by Gale Ency. of Medicine. Contributor trust: 36 [recommend contributor recommended]. Question popularity: 1 [recommend question].