Ketorolac is a nonsteroidal anti-inflammatory drug (NSAID) commonly prescribed for short-term management of moderate to severe pain. While highly effective for acute pain relief, like all medications, it carries a range of potential side effects that patients and caregivers should understand. Awareness of these reactions helps ensure the medication is used safely and effectively, minimizing risks while maximizing therapeutic benefit.
Common Physical Side Effects
The most frequently reported side effects involve the gastrointestinal system and general physical sensations. Many individuals experience some degree of stomach discomfort, heartburn, or nausea shortly after taking the medication. These symptoms occur because ketorolac can irritate the lining of the stomach and reduce the production of protective mucus, making the digestive tract more vulnerable.
Indigestion or heartburn
Nausea or vomiting
Drowsiness or dizziness
Headache
Fluid retention or swelling in the extremities
Serious Gastrointestinal Risks
Ulcers and Bleeding
Beyond simple indigestion, ketorolac carries a significant risk for more severe gastrointestinal complications. The drug can cause stomach ulcers and gastrointestinal bleeding, which can occur without warning symptoms. Patients over the age of 65, those with a history of stomach ulcers, or individuals who consume alcohol regularly are at a higher risk for these serious events. Any signs of black, tarry stools or vomiting blood require immediate medical attention.
Cardiovascular and Renal Concerns
Ketorolac can impact the cardiovascular and renal systems, particularly when used for extended periods. Because NSAIDs affect blood flow and pressure, they can lead to an increase in blood pressure or contribute to fluid retention. This places additional strain on the heart and kidneys, which is why long-term use is generally avoided. Patients with pre-existing heart conditions, high blood pressure, or kidney disease are usually advised to explore alternative pain management strategies.
Increased blood pressure
Fluid retention
Reduced kidney function
Elevated risk of heart attack or stroke (with long-term use)
Allergic Reactions and Hypersensitivity
Some individuals may develop an allergic reaction to ketorolac, even if they have taken it previously without issue. Symptoms of an allergy can range from mild skin rashes and itching to more severe reactions such as difficulty breathing or swelling of the face and throat. Those with asthma, nasal polyps, or hives triggered by aspirin or other NSAIDs are more likely to experience cross-sensitivity and should use this medication with extreme caution or avoid it entirely.
When to Contact a Healthcare Provider
While some mild side effects like a headache or mild stomach upset may resolve on their own, certain symptoms indicate a serious problem. Severe stomach pain, vomiting that looks like coffee grounds, sudden severe headaches, vision changes, or weakness on one side of the body are all red flags. Prompt communication with a healthcare provider ensures that these dangerous reactions are addressed immediately, preventing long-term complications.
