Preparing questions in advance can help patients to have more meaningful discussions with their physicians. Patients may wish to ask their doctors the following questions related to antihistamines:

1. Are antihistamines safe for me to take?
   
   
2. How and when should I take this drug?
   
   
3. What should I do if I miss a dose?
   
   
4. Would taking an antihistamine allow me to eat a food to which I am normally allergic?
   
   
5. What side effects may I develop?
   
   
6. For what side effects should I seek medical attention?
   
   
7. How long will it take for the drug to take effect?
   
   
8. How long will I have to take this drug?
   
   
9. Are there medications, nutritional supplements or herbal medications I should avoid while taking this drug?
   
   
10. How will I know if the drug is working?
    
    
11. What are other possible treatments if the drug does not work?