Patients do have different issues associated with oral drugs versus infused, or drugs given by shots. For one thing, the latter two are done at a clinician's office, and you have an appointment. You have to make your appointment, and they bring you in, and give you that treatment.
Oral drugs on the other hand, are more dependent on the patient to make sure that they themselves are taking that treatment. There are issues not only to make sure that they are taking them, but how should they be taking them?
Should they be taken with food, without food? What if I miss an oral treatment, is it OK to take it or should I wait till the next treatment cycle? What if they throw up that capsule or treatment, what do I do there? There are issues associated with oral treatments that patients have to understand.