Collocations for medication - noun

prescribed, prescription
non-prescription (esp. AmE), over-the-counter
regular
antidepressant, anti-inflammatory, antiviral, etc.
allergy, asthma, diabetes, etc.
oral, topical
herbal (AmE)

be on, receive, take
prescribe (sb)
administer, give sb
dispense
stop
She stopped the medication because of side effects.

adjust, change, switch
He talked with his doctor about changing his medication.

need, require

medication for
He is on regular medication for his fits.