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Medical Information
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APO-K
Additional Information
Proper Use of This Medicine
For patients taking the liquid form of this medicine:
- This medicine must be diluted in at least one-half glass (4 ounces) of cold water or juice to reduce its possible stomach-irritating or laxative effect.
- If you are on a salt (sodium)-restricted diet, check with your doctor before using tomato juice to dilute your medicine. Tomato juice has a high salt content.
For patients taking the soluble granule, soluble powder, or soluble tablet form of this medicine:
- This medicine must be completely dissolved in at least one-half glass (4 ounces) of cold water or juice to reduce its possible stomach-irritating or laxative effect.
- Allow any "fizzing" to stop before taking the dissolved medicine.
- If you are on a salt (sodium)-restricted diet, check with your doctor before using tomato juice to dilute your medicine. Tomato juice has a high salt content.
For patients taking the extended-release tablet form of this medicine:
- Swallow the tablets whole with a full (8-ounce) glass of water. Do not chew or suck on the tablet.
- Some tablets may be broken or crushed and sprinkled on applesauce or other soft food. However, check with your doctor or pharmacist first, since this should not be done for most tablets.
- If you have trouble swallowing tablets or if they seem to stick in your throat, check with your doctor. When this medicine is not properly released, it can cause irritation that may lead to ulcers.
For patients taking the extended-release capsule form of this medicine:
- Do not crush or chew the capsule. Swallow the capsule whole with a full (8-ounce) glass of water.
- Some capsules may be opened and the contents sprinkled on applesauce or other soft food. However, check with your doctor or pharmacist first, since this should not be done for most capsules.
Take this medicine immediately after meals or with food to lessen possible stomach upset or laxative action.
Take this medicine only as directed by your doctor . Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered. This is especially important if you are also taking both diuretics (water pills) and digitalis medicines for your heart.
Dosing
The dose of these single or combination medicines will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average dose of these medicines. If your dose is different, do not change it unless your doctor tells you to do so.
The number of ounces of solution that you drink, or the number of tablets or capsules you take, depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are taking the single or combination medicine.
- For oral dosage form (tablets for solution):
- To prevent potassium loss or replace potassium lost by the body:
- Adults and teenagers 25 to 50 milliequivalents (mEq) dissolved in one-half to one glass of cold water, taken one or two times a day. Your doctor may change the dose if needed. However, most people will not take more than 100 mEq a day.
- Children Dose must be determined by your doctor.
- To prevent potassium loss or replace potassium lost by the body:
- For oral dosage form (granules for solution):
- To prevent potassium loss or replace potassium lost by the body:
- Adults and teenagers 20 milliequivalents (mEq) dissolved in one-half to one glass of cold water, taken one or two times a day. Your doctor may change the dose if needed. However, most people will not take more than 100 mEq a day.
- Children Dose must be determined by your doctor.
- To prevent potassium loss or replace potassium lost by the body:
- For oral dosage form (tablets for solution):
- To prevent potassium loss or replace potassium lost by the body:
- Adults and teenagers 20, 25, or 50 mEq dissolved in one-half to one glass of cold water, taken one or two times a day. Your doctor may change the dose if needed. However, most people will not take more than 100 mEq a day.
- Children Dose must be determined by your doctor.
- To prevent potassium loss or replace potassium lost by the body:
- For oral dosage form (tablets for solution):
- To prevent potassium loss or replace potassium lost by the body:
- Adults and teenagers 25 or 50 milliequivalents (mEq) dissolved in one-half to one glass of cold water, taken one or two times a day. Your doctor may change the dose if needed. However, most people will not take more than 100 mEq a day.
- Children Dose must be determined by your doctor.
- To prevent potassium loss or replace potassium lost by the body:
- For oral dosage form (extended-release capsules):
- To replace potassium lost by the body:
- Adults and teenagers 40 to 100 milliequivalents (mEq) a day, divided into two or three smaller doses during the day. Your doctor may change the dose if needed. However, most people will not take more than 100 mEq a day.
- To prevent potassium loss:
- Adults and teenagers 16 to 24 mEq a day, divided into two or three smaller doses during the day. Your doctor may change the dose if needed. However, most people will not take more than 100 mEq a day.
- Children Dose must be determined by your doctor.
- To replace potassium lost by the body:
- For oral dosage form (liquid for solution):
- To prevent potassium loss or replace potassium lost by the body:
- Adults and teenagers 20 mEq mixed into one-half glass of cold water or juice, taken one to four times a day. Your doctor may change the dose if needed. However, most people will not take more than 100 mEq a day.
- Children Dose is based on body weight and must be determined by your doctor. The usual dose is 1 to 3 mEq of potassium per kilogram (kg) (0.45 to 1.36 mEq per pound) of body weight taken in smaller doses during the day. The solution should be well mixed in water or juice.
- To prevent potassium loss or replace potassium lost by the body:
- For oral dosage form (powder for solution):
- To prevent potassium loss or replace potassium lost by the body:
- Adults and teenagers 15 to 25 mEq dissolved in four to six ounces of cold water, taken two or four times a day. Your doctor may change the dose if needed. However, most people will not take more than 100 mEq a day.
- Children Dose is based on body weight and must be determined by your doctor. The usual dose is 1 to 3 mEq per kg (0.45 to 1.36 mEq per pound) of body weight taken in smaller doses during the day. The solution should be mixed into water or juice.
- To prevent potassium loss or replace potassium lost by the body:
- For oral dosage form (powder for suspension):
- To prevent potassium loss or replace potassium lost by the body:
- Adults and teenagers 20 mEq dissolved in two to six ounces of cold water, taken one to five times a day. Your doctor may change the dose if needed. However, most people will not take more than 100 mEq a day.
- Children Dose must be determined by your doctor.
- To prevent potassium loss or replace potassium lost by the body:
- For oral dosage form (extended-release tablets):
- To prevent potassium loss or replace potassium lost by the body:
- Adults and teenagers 6.7 to 20 mEq taken three times a day. However, most people will not take more than 100 mEq a day.
- Children Dose must be determined by your doctor.
- To prevent potassium loss or replace potassium lost by the body:
- For oral dosage form (liquid for solution):
- To prevent potassium loss or replace potassium lost by the body:
- Adults and teenagers 20 milliequivalents (mEq) mixed into one-half glass of cold water or juice, taken two to four times a day. Your doctor may change the dose if needed. However, most people will not take more than 100 mEq a day.
- Children Dose is based on body weight and must be determined by your doctor. The usual dose is 2 to 3 mEq per kilogram (kg) (0.9 to 1.36 mEq per pound) of body weight a day, taken in smaller doses during the day. The solution should be completely mixed into water or juice.
- To prevent potassium loss or replace potassium lost by the body:
- For oral dosage form (tablets):
- To prevent potassium loss or replace potassium lost by the body:
- Adults and teenagers 5 to 10 mEq taken two to four times a day. However, most people will not take more than 100 mEq a day.
- Children Dose must be determined by your doctor.
- To prevent potassium loss or replace potassium lost by the body:
- For oral dosage form (liquid for solution):
- To prevent potassium loss or replace potassium lost by the body:
- Adults and teenagers 20 milliequivalents (mEq) diluted in 2 tablespoonfuls or more of cold water or juice, taken two to four times a day. Your doctor may change the dose if needed. However, most people will not take more than 100 mEq a day.
- Children Dose is based on body weight and must be determined by your doctor. The usual dose is 2 to 3 mEq per kilogram (kg) (0.9 to 1.36 mEq per pound) of body weight taken in smaller doses during the day. The solution should be well mixed into water or juice.
- To prevent potassium loss or replace potassium lost by the body:
- For oral dosage form (powder for solution):
- To prevent potassium loss or replace potassium lost by the body:
- Adults and teenagers 20 mEq mixed in 2 tablespoonfuls or more of cold water or juice taken two to four times a day. Your doctor may change the dose if needed. However, most people will not take more than 100 mEq a day.
- Children Dose is base on body weight and must be determined by your doctor. The usual dose is 2 to 3 mEq per kg (0.9 to 1.36 mEq per pound) of body weight taken in smaller doses during the day. The solution should be well mixed into water or juice.
- To prevent potassium loss or replace potassium lost by the body:
- For oral dosage form (liquid for solution):
- To prevent potassium loss or replace potassium lost by the body:
- Adults and teenagers 20 milliequivalents (mEq) mixed into one-half glass of cold water or juice, taken two to four times a day. Your doctor may change the dose if needed. However, most people will not take more than 100 mEq a day.
- Children Dose is based on body weight and must be determined by your doctor. The usual dose is 2 to 3 mEq per kg (0.9 to 1.36 mEq per pound) of body weight taken in smaller doses during the day. The solution should be well mixed into water or juice.
- To prevent potassium loss or replace potassium lost by the body:
- For oral dosage form (liquid for solution):
- To prevent potassium loss or replace potassium lost by the body:
- Adults and teenagers 15 milliequivalents (mEq) mixed into one-half glass of cold water or juice, taken three or four times a day. Your doctor may change the dose if needed. However, most people will not take more than 100 mEq a day.
- Children Dose is based on body weight and must be determined by your doctor. The usual dose is 2 to 3 mEq per kilogram (kg) (0.9 to 1.36 mEq per pound) of body weight taken in smaller doses during the day. The solution should be well mixed into water or juice.
- To prevent potassium loss or replace potassium lost by the body:
Missed dose
If you miss a dose of this medicine and remember within 2 hours, take the missed dose right away with food or liquids. Then go back to your regular dosing schedule. However, if you do not remember until later, skip the missed dose and go back to your regular dosing schedule. Do not double doses.
Storage
To store this medicine:
- Keep out of the reach of children.
- Store away from heat and direct light.
- Do not store in the bathroom, near the kitchen sink, or in other damp places. Heat or moisture may cause the medicine to break down.
- Keep the liquid form of this medicine from freezing.
- Do not keep outdated medicine or medicine no longer needed. Be sure that any discarded medicine is out of the reach of children.
Before Using This Medicine
In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For potassium supplements, the following should be considered:
Allergies Tell your doctor if you have ever had any unusual or allergic reaction to potassium preparations. Also tell your doctor and pharmacist if you are allergic to any other substances, such as foods, preservatives, or dyes.
Pregnancy Potassium supplements have not been shown to cause problems in humans.
Breast-feeding Potassium supplements pass into breast milk. However, this medicine has not been reported to cause problems in nursing babies.
Children Although there is no specific information comparing use of potassium supplements in children with use in other age groups, they are not expected to cause different side effects or problems in children than they do in adults.
Older adults Many medicines have not been studied specifically in older people. Therefore, it may not be known whether they work exactly the same way they do in younger adults. Although there is no specific information comparing use of potassium supplements in the elderly with use in other age groups, they are not expected to cause different side effects or problems in older people than they do in younger adults.
Older adults may be at a greater risk of developing high blood levels of potassium (hyperkalemia).
Other medicines Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking potassium supplements, it is especially important that your doctor and pharmacist know if you are taking any of the following:
- Amantadine (e.g., Symmetrel) or
- Anticholinergics (medicine for abdominal or stomach spasms or cramps) or
- Antidepressants (medicine for depression) or
- Antidyskinetics (medicine for Parkinson's disease or other conditions affecting control of muscles) or
- Antihistamines or
- Antipsychotic medicine (medicine for mental illness) or
- Buclizine (e.g., Bucladin) or
- Carbamazepine (e.g., Tegretol) or
- Cyclizine (e.g., Marezine) or
- Cyclobenzaprine (e.g., Flexeril) or
- Disopyramide (e.g., Norpace) or
- Flavoxate (e.g., Urispas) or
- Ipratropium (e.g., Atrovent) or
- Meclizine (e.g., Antivert) or
- Methylphenidate (e.g., Ritalin) or
- Orphenadrine (e.g., Norflex) or
- Oxybutynin (e.g., Ditropan) or
- Procainamide (e.g., Pronestyl) or
- Promethazine (e.g., Phenergan) or
- Quinidine (e.g., Quinidex) or
- Trimeprazine (e.g., Temaril) Use with potassium supplements may cause or worsen certain stomach or intestine problems
- Angiotensin-converting enzyme (ACE) inhibitors (benazepril [e.g., Lotensin], captopril [e.g., Capoten], enalapril [e.g., Vasotec], fosinopril [e.g., Monotril], lisinopril [e.g., Prinivil, Zestril], quinapril [e.g., Accupril], ramipril [e.g., Altace]) or
- Amiloride (e.g., Midamor) or
- Beta-adrenergic blocking agents (acebutolol [e.g., Sectral], atenolol [e.g., Tenormin], betaxolol [e.g., Kerlone], carteolol [e.g., Cartrol], labetalol [e.g., Normodyne], metoprolol [e.g., Lopressor], nadolol [e.g., Corgard], oxprenolol [e.g., Trasicor], penbutolol [e.g., Levatol], pindolol [e.g., Visken], propranolol [e.g., Inderal], sotalol [e.g., Sotacor], timolol [e.g., Blocadren]) or
- Heparin (e.g., Panheprin) or
- Inflammation or pain medicine (except narcotics) or
- Potassium-containing medicines (other) or
- Salt substitutes, low-salt foods, or milk or
- Spironolactone (e.g., Aldactone) or
- Triamterene (e.g., Dyrenium) Use with potassium supplements may further increase potassium blood levels, which may cause or worsen heart problems
- Digitalis glycosides (heart medicine) Use with potassium supplements may make heart problems worse
- Thiazide diuretics (water pills) If you have been taking a potassium supplement and a thiazide diuretic together, stopping the thiazide diuretic may cause hyperkalemia (high blood levels of potassium)
- Addison's disease (underactive adrenal glands) or
- Dehydration (excessive loss of body water, continuing or severe)
- Diabetes mellitus (sugar diabetes) or
- Kidney disease Potassium supplements may increase the risk of hyperkalemia (high blood levels of potassium), which may worsen or cause heart problems in patients with these conditions
- Diarrhea (continuing or severe) The loss of fluid in combination with potassium supplements may cause kidney problems, which may increase the risk of hyperkalemia (high blood levels of potassium)
- Heart disease Potassium supplements may make this condition worse
- Intestinal or esophageal blockage Potassium supplements may damage the intestines
- Stomach ulcer Potassium supplements may make this condition worse

