Potassium Chloride

Also indexed as: Apo-K, K-10, K-Dur, Kaochlor, Klor-Con, Klorvess, Roychlor, Slow-K

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Potassium chloride is a prescription drug used to replace potassium in people with low blood levels of potassium, to prevent potassium depletion in specific diseases or resulting from specific drug therapies, and to help lower mild high blood pressure in some people. Potassium chloride is also available without prescription in some supplements and in salt substitutes found in grocery stores. While potassium depletion is a health risk, high levels of potassium are also associated with health risks. Potassium-containing drugs should be used only under medical supervision. The potassium found in fruit is both safe and healthy for most people, except those taking potassium-sparing diuretic drugs and individuals with kidney failure.

Summary of Interactions with Vitamins, Herbs, and Foods
In some cases, a herb or supplement may appear in more than one category, which may seem contradictory. For clarification, read the full article for details about the summarized interactions.

Check Check: Other—Before taking any of these supplements or eating any of these foods with your medication, read this article in full for details.

Digitalis

Salt substitutes

Depletion or interference

None known

Side effect reduction/prevention

None known

Supportive interaction

None known

Reduced drug absorption/bioavailability

None known

Adverse interaction

None known

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An asterisk (*) next to an item in the summary indicates that the interaction is supported only by weak, fragmentary, and/or contradictory scientific evidence.

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Interactions with Dietary Supplements

Salt substitutes
Salt substitutes (No Salt®, Salt Substitute®, Lite Salt®, and others) contain potassium chloride in place of sodium chloride. They are used by people on sodium-restricted diets. When used in moderation, they are a more healthy choice for many people compared with using regular table salt. However, people taking potassium chloride drug products should consult with their prescribing doctor before using salt substitutes1 or even eating large amounts of high-potassium foods (primarily fruit).

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Interactions with Herbs

Digitalis (Digitalis lanata, Digitalis purpurea)
Digitalis refers to a family of plants commonly called foxglove that contain digitalis glycosides, chemicals with actions and toxicities similar to the prescription drug digoxin. Low serum potassium increases the risk of digitalis toxicity.2 People using digitalis-containing products should have their potassium status monitored by the healthcare professional overseeing the digitalis therapy.

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Interactions with Foods and Other Compounds

Food
Potassium chloride drugs should be taken after meals to avoid stomach upset.3 Potassium-containing salt substitutes, however, are meant to be taken with food. Tablets should be swallowed whole and chewing or crushing should be avoided.4 Liquid, powder, and effervescent potassium chloride products may be dissolved in a glass of cold water or juice to mask the unpleasant flavour.5

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References
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