The hospital says it has been making improvements since the CQC visit in February
Inspectors have raised "urgent concerns" about the "the unsafe storage of medicines" by a hospital trust.
The Care Quality Commission (CQC) found Northamptonshire Healthcare NHS Trust, external "required improvement" in all five areas inspected.
They found issues in inpatient and dental services as well as end of life care.
The hospital's chief operating officer Richard McKendrick said they had been "proactive" in making improvements.
The CQC said it had "raised urgent concerns about the unsafe storage of medicines at St Giles Street clinic", "patient records across community inpatient services were not always completed fully" and "wards were short of nursing staff".
However, they also found patients treated with "compassion and respect", "good multi-disciplinary working" and some areas were "well led".
Mr McKendrick said: "We take patient care very seriously and quality care is our ongoing priority regardless.
"We have been proactive in our approach, operationally and clinically and since the CQC visit in February many of the improvements they highlighted to us, or that we had already identified ourselves, have been addressed.
"We are committed to a programme of improvement, both in individual services and trust wide."
