NEW BRUNSWICK, NJ - About 41.1 million children in the United States - dressed as superheroes, shambling zombies or preening princesses - trick or treat on Halloween night.

Bruce Ruck, managing director of the New Jersey Poison Control Center at Rutgers New Jersey Medical School’s Department of Emergency Medicine, offers the following advice to avoid the risks of poisoning and allergic reactions:

* Before allowing children to eat candy, inspect it for tampering. Signs of tampering may include opened wrappers, wrapping that doesn’t match the candy inside, labels with misspelled words or candy that looks or smells strange.

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* Watch for marijuana edibles masquerading as candy. Be aware of how similar these products can look like store-bought candy – with similar names and packaging, but whose spellings or wrapper color might be slightly different. Ecstasy pills or other drugs can also look like colorful candy. These products may contain high concentrations of drugs, causing the potential for severe effects in adults or children.

* Be Alert to Food Allergies. One in 13 children under the age of 18 in the United States is allergic to foods such as peanuts, wheat, milk, tree nuts or eggs. Many children can have severe reactions. If your child is allergic, monitor the candy and other treats they take.

*Use Caution with Face Paint and Makeup. Face products may cause skin irritation. Parents should purchase items from reputable sources with a recognizable or name brand or check the ingredients for known allergens. Apply the product to a small area first. Some cosmetics and paints, especially those that are imported or found at bargain stores, have been found to contain lead. Anyone who uses face paint should wash their hands with soap and water before eating.

* Do Not Wear Non-Prescription Costume Contact Lenses. These products could contain chlorine, iron and other dangerous chemicals and are not approved by the Food and Drug Administration, according to the American Academy of Ophthalmology. Only buy decorative contact lenses from retailers that require a prescription and sell FDA-approved products.

* Be Careful with Alcohol. Many at-home Halloween parties serve alcoholic beverages. It is important to realize the alcohol content in beer, wine, liquor and cocktails/punches affects children and pets differently than it does adults; even ingesting a small amount could lead to serious health complications or death. A person who seems very drunk or has passed out may be showing early signs of alcohol poisoning and be in real danger. Immediate medical help is essential. “Sleeping it off” is never a safe option. Know the critical signs of alcohol poisoning.

* Watch Your Pets. Chocolate, cocoa, candy and other products containing xylitol, an artificial sweetener, are poisonous to pets and can cause vomiting, diarrhea, seizures or even death.

* Act fast if a person or pet has ingested a potentially dangerous product. If a child, adult or pet has ingested a potentially dangerous product, contact the NJ Poison Center at 800-222-1222 for immediate medical advice from doctors, nurses and pharmacists who are on call 24 hours a day, seven days a week.