Do not take this medication with any of the following:
-Disulfiram

They need to know if you have any of these conditions:
-Cockayne syndrome
-Low blood counts, such as low white cell, platelet, or red cell counts
-Tingling of the fingers or toes, or other nerve disorder
-An unusual or allergic reaction to benznidazole, other medications, foods, dyes, or preservatives
-Pregnant or trying to get pregnant
-Breast-feeding

Visit your care team for regular checks on your progress. Tell your care team if your symptoms do not start to get better or if they get worse.
This medication may cause serious skin reactions. They can happen weeks to months after starting the medication. Contact your care team right away if you notice fevers or flu-like symptoms with a rash. The rash may be red or purple and then turn into blisters or peeling of the skin. You may also notice a red rash with swelling of the face, lips, or lymph nodes in your neck or under your arms.
Talk to your care team if you wish to become pregnant or think you might be pregnant. This medication can cause serious birth defects if taken during pregnancy and for 5 days after stopping treatment. A reliable form of contraception is recommended while taking this medication and for 5 days after stopping treatment. Talk to your care team about effective forms of contraception.
This medication may cause infertility. Talk to your care team if you are concerned about your fertility.

Keep out of the reach of children and pets.
Store between 20 and 25 degrees C (68 and 77 degrees F). Protect from moisture. Keep the container tightly closed. Get rid of any unused medication after the expiration date.
To get rid of medications that are no longer needed or have expired:
-Take the medication to a medication take-back program. Check with your pharmacy or law enforcement to find a location.
-If you cannot return the medication, check the label or package insert to see if the medication should be thrown out in the garbage or flushed down the toilet. If you are not sure, ask your care team. If it is safe to put it in the trash, take the medication out of the container. Mix the medication with cat litter, dirt, coffee grounds, or other unwanted substance. Seal the mixture in a bag or container. Put it in the trash.