Preparing questions in advance can help patients to have more meaningful discussions with their physicians regarding their conditions. Patients may wish to ask their doctor 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. What side effects may I develop?
   
   
5. For what side effects should I seek medical attention?
   
   
6. How long will it take for the drug to take effect?
   
   
7. How long will I have to take this drug?
   
   
8. Are there medications, nutritional supplements or herbal medications I should avoid while taking this drug?
   
   
9. How will I know if the drug is working?
   
   
10. What are other possible treatments if the drug does not work?