Drug Information

Ketorolac is used orally to treat moderately severe acute pain (e.g., migraine headaches), but should not be used for more than five days. It is also used in the eye to treat itching due to seasonal allergies and to prevent inflammation following cataract surgery.

Common brand names:

Acular, Acular LS, Toradol, Acular PF

Summary of Interactions with Vitamins, Herbs, & Foods

Types of interactions: Beneficial Adverse Check

Replenish Depleted Nutrients

  • Iron

    NSAIDs cause gastrointestinal (GI) irritation, bleeding, and iron loss. Iron supplements can cause GI irritation. However, iron supplementation is sometimes needed in people taking NSAIDs if those drugs have caused enough blood loss to lead to iron deficiency. If both iron and nabumetone are prescribed, they should be taken with food to reduce GI irritation and bleeding risk.

Reduce Side Effects

  • Licorice

    The flavonoids found in the extract of licorice (Glycyrrhiza glabra) known as DGL (deglycyrrhizinated licorice) are helpful for avoiding the irritating actions NSAIDs have on the stomach and intestines. One study found that 350 mg of chewable DGL taken together with each dose of aspirin reduced gastrointestinal bleeding caused by the aspirin. DGL has been shown in controlled human research to be as effective as drug therapy (cimetidine) in healing stomach ulcers.

Support Medicine

  • Stinging Nettle

    In a controlled human study, people who took stinging nettle with diclofenac obtained similar pain relief compared to people taking twice as much diclofenac with no stinging nettle. More research is needed to determine whether people taking diclofenac might benefit from also taking stinging nettle.

Reduces Effectiveness

  • High-Fat

    Taking ketorolac with a high-fat breakfast slows the speed of drug absorption by about an hour, but it does not affect overall blood levels of the drug. To lessen stomach upset, ketorolac tablets should be taken with a meal or a snack.

Potential Negative Interaction

  • Potassium

    A 50-year-old male developed high blood levels of potassium following eight days of ketorolac treatment. Additional research is needed to determine whether taking ketorolac together with supplemental potassium might enhance this side effect. individuals taking oral ketorolac should probably avoid potassium supplements and salt substitutes until more information is available.

  • White Willow

    White willow bark (Salix alba) contains salicin, which is related to aspirin. Both salicin and aspirin produce anti-inflammatory effects after they have been converted to salicylic acid in the body. The administration of salicylates like aspirin to individuals taking oral NSAIDs may result in reduced blood levels of NSAIDs. Though no studies have investigated interactions between white willow bark and NSAIDs, people taking NSAIDs should avoid the herb until more information is available.

    The interaction is supported by preliminary, weak, fragmentary, and/or contradictory scientific evidence.

Explanation Required 

  • none

The Drug-Nutrient Interactions table may not include every possible interaction. Taking medicines with meals, on an empty stomach, or with alcohol may influence their effects. For details, refer to the manufacturers' package information as these are not covered in this table. If you take medications, always discuss the potential risks and benefits of adding a new supplement with your doctor or pharmacist.