Final answer:
The FDA advises against the use of OTC cough and cold products in children younger than 6 years of age to prevent potential harm due to the lack of proven benefits.
Step-by-step explanation:
The FDA does not recommend OTC cough and cold products to be used on anyone younger than the age of 6 years of age. The correct answer is option d. 6.
The use of over-the-counter (OTC) cough and cold medications in children has been a topic of concern due to questionable efficacy and potential side effects. Research has indicated that these medications may provide little to no benefit in reducing cough symptoms and can have harmful effects, especially in younger children. As a result, neither the Canadian nor United States health authorities recommend the use of these medicines in children who are under 6 years old. Furthermore, for certain populations, such as those with asthma, diabetes, and chronic lung diseases, vaccinations like the flu vaccine are recommended to prevent complications rather than relying on OTC remedies that lack evidence of effectiveness.