OralExitHealthC a flu shot: 流感疫苗, vacuna contra la gripe, грипп (прививка)

the receptionist:

an opening: an available time for an appointment

the medication: the medicine

to get a prescription filled at the pharmacy: to give the paper with the medicine name on it to the pharmacist so she can put the medicine in a bottle and give it to you

a tablet: 药 片 , pastilla, таблетка