Such as cold medicines, allergy medicines and motion sickness drugs, can cause drowsiness, decreased attention span and lower reaction time.
a. prescription drugs,
b. over-the-countermedications,
c. illegal drugs,

b. Over-the-counter medications,

Explanation:

Over-the-counter medications are those medicines or drugs which are sold directly without any kind of prescription by the healthcare professionals as opposed to the prescribed medicines or drugs.

These medications are associated with physiological responses as side effects such as allergies, cold and flu, constipation, nausea, drowsiness, motion sickness, low reaction time and decrease attention span.