I did some research on sulfa drugs and alcohol and here are a few things I found on different sites. Hope this helps.
Sulfite Allergies
A group of sulfur-containing compounds known as sulfites occur naturally in wine and beer, and they help inhibit the growth of harmful bacteria. Vintners sometimes add additional sulfites to wines as preservatives. In susceptible individuals, sulfites can trigger asthma attacks or even anaphylactic shock.
For most sulfite-sensitive people, the asthmatic response is dose-sensitive and very low amounts of sulfites do not trigger a response. U.S. labeling laws require any food with sulfite concentrations greater than 10 parts per million (ppm) to be listed on the label using the term "contains sulfites," and for the vast majority of people, concentrations too low to require this warning don't cause problems.
If your allergist has alerted you that you may be at risk of anaphylaxis or other systemic reactions due to sulfites, however, you should avoid all wine, since there is no such thing as a truly sulfite-free wine. Organic wines are, by law, not allowed to include added sulfites, though some do include enough natural sulfites to be problematic for some asthmatic individuals.
Sulfa Drugs - Sulfa drugs are anti-infectives which are used to treat stomach and urinary infections.
Some commonly used sulfa drugs: co-trimoxazole/Bactrim, Septra sulfisoxazole/Gantrisin
Interaction - Avoid alcohol, as the combination may cause nausea.
Which Foods Contain Sulfites?
Greater than 100 ppm of sulfites (very high levels, strict avoidance advised in people with sulfite allergy)
* dried fruits (excluding dark raisins and prunes)
* bottled lemon juice (non-frozen)
* bottled lime juice (non-frozen)
* wine
* molasses
* sauerkraut (and its juice)
* grape juices (white, white sparkling, pink sparkling, red sparkling)
* pickled cocktail onions
Between 50 and 99.9 ppm of sulfites (moderate to high levels of sulfite, avoidance advised in people with sulfite allergy)
* dried potatoes
* wine vinegar
* gravies/sauces
* fruit toppings
* Maraschino cherries
Between 10 and 49.9 ppm of sulfites (low to moderate levels of sulfite, may cause symptoms in people with severe sulfite allergy)
* pectin
* fresh shrimp
* corn syrup
* pickled peppers
* pickles/relish
* corn starch
* hominy
* frozen potatoes
* maple syrup
* imported jams and jellies
* fresh mushrooms
* imported sausages and meats
* cordials (alcoholic)
* dehydrated vegetables
* various cheeses
* corn bread/muffin mix
* canned/jarred clams
* clam chowder
* avocado dip/guacamole
* imported fruit juices and soft drinks
* ciders and cider vinegars
Less than 10 ppm of sulfites (very low sulfite levels, generally do not pose a risk, even for people with sulfite allergy)
* malt vinegar
* canned potatoes
* beer
* dry soup mix
* soft drinks
* frozen pizza and pie dough
* beet sugar
* gelatin
* coconut
* fresh fruit salad
* domestic jams and jellies
* crackers
* cookies
* grapes
* high fructose corn syrup