The following foods and drugs MAY contain sulfites, according to the Food and Drug Administration. Not all manufacturers use sulfites in these products, and the amounts may vary. Remember to check the product label.
Food Category Type of Food
Alcoholic Beverages Beer, cocktail mixes, wine, wine coolers.
Baked Goods Cookies, crackers, mixes with dried fruits or vegetables, pie crust, pizza crust, quiche crust, flour tortillas.
Beverage Bases Dried citrus fruit beverage mixes.
Condiments and Relishes Horseradish, onion and pickle relishes, pickles, olives, salad dressing mixes, wine vinegar.
Confections and Frostings Brown, raw, powdered or white sugar derived from sugar beets.
Modified Dairy Products Filled milk (a specially prepared skim milk in which vegetable oils, rather than animal fats, are added to increase its fat content).
Drugs Antiemetics (taken to prevent nausea), cardiovascular drugs, antibiotics, tranquilizers, intravenous muscle relaxants, analgesics (painkillers), anesthetics, steroids and nebulized bronchodilator solutions (used for treatment  of asthma).
Fish and Shellfish Canned clams; fresh, frozen, canned or dried shrimp; frozen lobster; scallops; dried cod. 
Fresh Fruit and Vegetables Sulfite use banned (except for fresh potatoes).
Gelatins, Puddings, and Fillings Fruit fillings, flavored and unflavored gelatin, pectin jelling agents.
Grain Products and Pastas Cornstarch, modified food starch, spinach pasta, gravies, hominy, breadings, batters, noodle/rice mixes.
Jams and Jellies Jams and jellies.
Nuts and Nut Products Shredded coconut.
Plant Protein Products Canned, bottled or frozen fruit juices (including lemon, lime, grape and apple); dried fruit; canned, bottled or frozen dietetic fruit or fruit juices; maraschino cherries and glazed fruit.
Processed Vegetables Vegetable juice, canned vegetables (including potatoes), pickled vegetables (including sauerkraut), dried vegetables, instant mashed potatoes, frozen potatoes and potato salad.
Snack Foods Dried fruit snacks, trail mixes, filled crackers.
Soups and Soup Mixes Canned seafood soups, dried soup mixes.
Sweet Sauces, Toppings Corn syrup, maple syrup, fruit toppings, and Syrups high-fructose corn syrup, pancake syrup.
Tea Instant tea, liquid tea concentrates.

* Table modified from: The Food Marketing Institute web page -