Midamor Side Effects

Generic Name: amiloride

Note: This page contains information about the side effects of amiloride. Some of the dosage forms included on this document may not apply to the brand name Midamor.

Not all side effects for Midamor may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

For the Consumer

Applies to amiloride: oral tablet

In addition to its needed effects, some unwanted effects may be caused by amiloride (the active ingredient contained in Midamor). In the event that any of these side effects do occur, they may require medical attention.

You should check with your doctor immediately if any of these side effects occur when taking amiloride:

More common
  • Abdominal pain
  • confusion
  • difficulty with breathing
  • irregular heartbeat
  • nausea or vomiting
  • nervousness
  • numbness or tingling in the hands, feet, or lips
  • shortness of breath
  • weakness or heaviness of the legs
Less common
  • Agitation
  • back pain
  • blurred vision
  • coma
  • dizziness
  • drowsiness
  • fever
  • hallucinations (seeing things that aren't there)
  • headache
  • irritability
  • labored breathing
  • mood or mental changes
  • seizures (convulsions)
  • stiff neck
  • tightness in the chest
  • unusual tiredness or weakness
  • vomiting
  • wheezing
Rare
  • Arm or jaw pain
  • bloody or black, tarry stools
  • burning while urinating
  • burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
  • change in vision
  • chest pain, discomfort, or heaviness
  • chills
  • clay-colored stools
  • cold sweats
  • constipation
  • dark urine
  • difficult or painful urination
  • dizziness, faintness, or lightheadedness when getting up from a lying or sitting position suddenly
  • fainting
  • fast, pounding, racing, or slow heartbeat or pulse
  • itching
  • light-colored stools
  • loss of appetite
  • loss of vision
  • rash
  • shakiness in the legs, arms, hands, or feet
  • stomach pain, severe
  • sweating
  • trembling or shaking of the hands or feet
  • unpleasant breath odor
  • vomiting of blood or material that looks like coffee grounds
  • yellow eyes or skin
Incidence not known
  • Continuing stomach pain
  • cough
  • lower back or side pain
  • pale skin
  • sore throat
  • sores, ulcers, or white spots on the lips or in the mouth
  • swollen or painful glands
  • unusual bleeding or bruising

If any of the following symptoms of overdose occur while taking amiloride, get emergency help immediately:

Symptoms of overdose
  • Decreased urination
  • dry mouth
  • increase in heart rate
  • lightheadedness
  • muscle cramps or pain
  • pain or weakness in the hands or feet
  • rapid breathing
  • sunken eyes
  • thirst
  • wrinkled skin

Some of the side effects that can occur with amiloride may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

More common
  • Diarrhea
  • weight loss
Less common
  • Changes in appetite
  • decreased interest in sexual intercourse
  • inability to have or keep an erection
  • loss in sexual ability, desire, drive, or performance
Rare
  • Acid or sour stomach
  • belching
  • continuing ringing or buzzing or other unexplained noise in the ears
  • discouragement
  • disturbed color perception
  • double vision
  • excess air or gas in the stomach or intestines
  • feeling of constant movement of self or surroundings
  • feeling sad or empty
  • frequent urination
  • full or bloated feeling
  • hair loss or thinning of hair
  • hearing loss
  • increased need to urinate
  • increased volume of pale, dilute urine
  • indigestion
  • joint pain
  • leg ache or pain
  • loss of interest or pleasure
  • neck or shoulder ache
  • night blindness
  • overbright appearance of lights
  • pain in the chest below the breastbone
  • passing of gas
  • passing urine more often
  • pressure in the stomach
  • seeing halos around lights
  • sensation of spinning
  • sleepiness or unusual drowsiness
  • sleeplessness
  • stomach fullness, discomfort, or upset
  • stuffy nose
  • swelling of abdominal or stomach area
  • swelling of the breasts or breast soreness in both females and males
  • trouble concentrating
  • trouble sleeping
  • tunnel vision
  • unable to sleep

For Healthcare Professionals

Applies to amiloride: compounding powder, oral tablet

Metabolic

Cases of severe hyponatremia have been reported during hydrochlorothiazide-amiloride (the active ingredient contained in Midamor) therapy. In 3 cases, the patients subsequently did well with hydrochlorothiazide and potassium supplementation, suggesting a significant role for amiloride in the development of their hyponatremia.

Significantly elevated serum uric acid, cholesterol, and triglyceride levels have been associated with combination hydrochlorothiazide-amiloride therapy. These metabolic abnormalities may not be due to amiloride since they are reported during hydrochlorothiazide monotherapy.

Amiloride is known to cause significant elevations in serum aldosterone, renin, and angiotensin II levels.

Metabolic side effects are the most common. Amiloride may cause hyperkalemia in up to 10% of patients, although the risk is decreased to about 1% to 2% when thiazide or loop diuretics are coadministered. Patients with diabetes or who are on other potassium-sparing therapy, ACE inhibitors, or potassium supplementation are predisposed to amiloride-induced hyperkalemia.

Renal

Renal side effects including renal insufficiency is unusual after amiloride (the active ingredient contained in Midamor) monotherapy because it is only a weak diuretic.

Gastrointestinal

Gastrointestinal complaints of diarrhea, nausea, constipation, anorexia, and general abdominal pain occur less than 5% of patients.

Nervous system

Nervous system side effects occur in less than 3% of patients, and include headache, weakness, and fatigue. Encephalopathy may be induced by amiloride-associated metabolic changes in some patients with severe liver disease.

Cardiovascular

Cardiovascular side effects are mainly limited to the increased risk of hyperkalemia-induced arrhythmias in patients at risk for arrhythmias. Angina pectoris, arrhythmias, and orthostatic hypotension are reported in less than 1% of patients.

Genitourinary

Genitourinary problems include rare complaints of impotence. Polyuria and urinary frequency are reported in less than 1% of patients.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.

Hide
(web4)