SIDE EFFECTS: Headache, nausea, vomiting, stomach upset, unusual hair loss, or loss of appetite may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly. Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor right away if any of these unlikely but serious side effects occur: fast/pounding heartbeat, unusual tiredness, weakness, dark urine, mental/mood changes (e.g., nervousness, depression), shaking (tremor). Tell your doctor right away if any of these rare but very serious side effects occur: pain/redness/swelling of arms or legs, easy bruising/bleeding, signs of infection (e.g., fever, persistent sore throat). Seek immediate medical attention if any of these rare but very serious side effects occur: trouble breathing, chest pain. A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

PRECAUTIONS: Before taking acetohydroxamic acid, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney disease, blood clots, blood/bone marrow disorders (e.g., anemia), regular alcohol use. Avoid alcoholic beverages while taking this medication because alcohol with acetohydroxamic acid may cause a skin reaction (e.g., flushing, redness, warmth, tingling). The reaction usually appears 30 to 45 minutes after having alcohol and disappears 30 to 60 minutes later. This medication must not be used during pregnancy. It may harm an unborn baby. Therefore, it is important to prevent pregnancy while taking this medication. Consult your doctor for more details and to discuss the use of reliable forms of birth control (e.g., condoms, birth control pills) while taking this medication. If you become pregnant or think you may be pregnant, tell your doctor right away. This drug may pass into breast milk and may have undesirable effects on a nursing infant. Consult your doctor before breast-feeding.

DRUG INTERACTIONS: Your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with your doctor or pharmacist first. Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: iron-containing products taken by mouth (e.g., supplements, multivitamins). This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist.

OVERDOSE: If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: loss of appetite, weakness, unusual tiredness, nausea, vomiting, shaking (tremor).