Immediate Actions

 
If you realise you’ve consumed a Double Cheesy Crust Pan Pizza from Pizza Hut and are allergic to any of its allergens (Milk, Wheat, Soy, Gluten, Cheese), immediately follow these steps:

Stop Eating

 
Cease the consumption of the pizza at once and do not consume any more foods that may contain the allergens.

Monitor Symptoms

 
Pay close attention to any abnormal physical changes or discomfort. Symptoms of an allergy may manifest as hives, itching or swelling in the mouth or throat, difficulty breathing, abdominal pain, vomiting, dizziness or fainting.

Seek Medical Attention

 
If you begin experiencing severe symptoms, get in touch with emergency services or go to the hospital immediately. Don’t attempt to drive yourself.

Take Antihistamines

 
If your reaction is mild, you may take an over-the-counter antihistamine, if you are not allergic.

Long-Term Measures

 
If this is the first time you are experiencing an allergic reaction after eating allergen-related foods, it’s vital to get an official allergen test. If you already have a diagnosed allergy and consumed the allergenic food accidentally or unknowingly, these are the steps you can take:

Consult an Allergist

 
Assess your allergy management plan with your allergist. Discussing your recent exposure to the allergen can help your doctor modify your existing plan or develop a new one.

Consider Allergen Immunotherapy

 
Allergen immunotherapy can help diminish your sensitivity to allergens over time. It entails receiving gradually increased doses of the allergen, administered by injection or tablets/drops under the tongue.

Regular Follow-Ups

 
Maintain regular follow-up visits with your allergist to monitor your progress and adjust treatment as necessary.

Be Proactive

 
Request ingredient lists or nutritional information at restaurants to avoid accidental allergen consumption. You may also consider wearing a medical alert bracelet or carrying an EpiPen, prescribed by your doctor.

 
Remember, managing an allergy is a lifelong commitment. Your safety and health are significantly dependent upon following your allergist's advice and keeping away from allergens as much as possible.