That depends ~ if you are allergic to corn protein but your threshhold of tolerance isn't too low, then you may be ok with corn derivatives like corn starch & corn syrup. Experimentation may be the only way to figure it out, too, since there isn't really a good test for corn syrup/starch/etc.
How severe are your allergy symptoms from corn? If you aren't sure, then ask your Allergist about challenging corn derivatives at the doctor's office instead of at home so that if there is a severe reaction, then there are staff with training and supplies close at hand to deal with the reaction. If your symptoms are milder, then it is ok to try corn derivatives at home, as long as you have allergy medication close at hand (benadryl, epi-pen). If you do go ahead with a challenge at home, then have someone else there with you to help observe for symptoms and such, because one of the symptoms of anaphylaxis is brain fog - confusion and difficulty concentrating - that may interfere with your ability to determine whether or not you need to take medication/use epipen/call 911.
Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD (Lupus?), Osteoporosis, Anemia, T- & B-Cell Lymphopenia, malabsorption/malnutrition, Lyme Disease (Igenex Lab IgM WesternBlot positive/CDC negative), etc.
Meds: Pulmicort, Injectable Vitamin B12, Herbs, Nutritional Supplements, Homeopathy.