Hydrochlorothiazide Toxicity: A Broadview

Introduction:

Hydrochlorothiazide is a drug that can be taken orally and is available in generic form only. Generic drugs generally cost less when compared to brand-name drugs. Hydrochlorothiazide is also known as a water pill (diuretic) since it reduces fluid retention (edema) caused by conditions such as liver diseases, kidney diseases, fluid accumulation due to the use of hormones like estrogen or other steroids, and congestive heart failure (a condition in which heart is not efficiently pumping blood as it should).

In What Conditions Is Hydrochlorothiazide Prescribed?

Hydrochlorothiazide is the second most often prescribed anti-hypertensive drug in the United States. The Food and Drug Administration (FDA) authorized the use of this medicine in 1959. Hydrochlorothiazide (HCTZ or HCT) is a prescription drug most frequently used to treat swelling caused by edema (swelling as a result of fluid buildup) or water retention, which is commonly linked to the following:

• Elevated blood pressure (hypertension).

• Enlarged heart disease.

• Liver cirrhosis (scarring of the liver).

• Renal failure.

• Nephrotic syndrome (a disorder of the kidneys which causes excessive leakage of protein from the body into the urine).

• Intake of medications called corticosteroids or estrogens.

This prescription drug is typically used with other medications that control blood pressure, cholesterol, arrhythmias (irregular heartbeat), and other disorders.

How Does Hydrochlorothiazide Work?

Hydrochlorothiazide increases urine output by enabling the kidneys to eliminate electrolytes, like sodium and water, from the body. It also permits blood to flow more freely, which may help lower blood pressure.

What Are the Side Effects of Hydrochlorothiazide?

Usually, a doctor can help manage the bothersome side effects of Hydrochlorothiazide usage by altering the dosage. Typical side effects of Hydrochlorothiazide include:

• Muscle sluggishness.

• Thirst.

• Blurred vision.

• Lightheadedness.

• Constipation.

• Photosensitivity (a condition in which the skin becomes extremely sensitive to sunlight or other ultraviolet light and tends to burn quickly).

There are potentially severe adverse effects of HCTZ, including allergic reactions, that may call for immediate medical attention.

Among the hazardous adverse effects are the following:

• Severe abdominal discomfort.

• Persistent appetite loss.

• Stools or urine with a clay-like hue.

• Uncommon bleeding or bruising.

• A cutaneous rash that causes the skin to peel.

• A rapid or erratic pulse.

• Feeling tingly or numb.

• Eyes or skin that has become yellow (jaundice).

Can a Person Get High Using Hydrochlorothiazide?

To minimize swelling or edema, diuretic medications like Hydrochlorothiazide particularly elevate the amount of urine the body generates. Unfortunately, even though few people intentionally seek this sensation as high, there has been occasional drug abuse with this chemical. Of the 92,557 persons who reported adverse side effects from using Hydrochlorothiazide, 112 said that abusing or becoming addicted to the drug was one of those unwanted effects. This happens most frequently in those who consume the medication for more than ten years. It may be a sign of drug abuse if taken in dosages more than that instructed by the physician or if there are any relapse behaviors from prior addictions.

Contrary to many prescription medicines, this drug was found to be overused by women more than men; nevertheless, this could be because women are physiologically more susceptible to water retention than males. Various reports state the following:

• About 57.8 percent of women were found to have overused this drug, while males contributed to 42.2 percent.

• At least 29 percent of the population who overused this drug was over 60 years old.

• About 28 percent of drug overuse was in the population who belonged to the age group of 40 to 49 years.

Why Is Hydrochlorothiazide Commonly Misused?

Athletes may abuse diuretics to lose weight quickly through dehydration to compete in a weight division or achieve certain weight standards. Diuretics can also remove residues of performance-enhancing substances from urine tests, such as stimulants or steroids. However, the World Anti-Doping Agency (WADA) lists several diuretics as prohibited during competition. Diuretics were among the 7.9 percent of prohibited drugs discovered on testing in 2008.

According to WADA laboratories, Hydrochlorothiazide, the most often discovered drug, was found in 137 instances (31.4 percent of positive cases). That year, Furosemide was surpassed by Hydrochlorothiazide as the most often abused diuretic medicine. Although Hydrochlorothiazide has a relatively short half-life and is usually removed from the body within 24 to 48 hours after consumption, WADA routinely tests athletes during and between events. In rare cases, persistent activity for an hour or more might reduce its half-life. Regular drug testing is crucial to detect instances of usage.

What Are the Different Drug Interactions With Hydrochlorothiazide?

• As Hydrochlorothiazide affects blood pressure and edema linked to long-term health issues, it may interact with several other prescription treatments, and illegal substances may render Hydrochlorothiazide ineffective or create dangerous side effects.

• Drugs that dangerously increase heart rate, blood pressure, and breathing rate include Adderall, Ritalin, Cocaine, MDMA (3,4-methylenedioxymethamphetamine), and bath salts. They may also increase body temperature, which might harm the kidneys.

• Hydrochlorothiazide can worsen heart and renal damage; any present or previous abuse of these stimulant medicines has to be disclosed to a doctor if this prescription is recommended.

• Alcohol is one of the most harmful substances that affect Hydrochlorothiazide. In addition, despite being a legal intoxicant, alcohol is a sedative and negatively interacts with many prescription drugs. When alcohol and Hydrochlorothiazide are used together, blood pressure might drop quickly, which can cause fainting or very bad dizziness. Additionally, it may exacerbate other adverse consequences, such as impaired cognition (brain health) or eyesight.

What Happens if One Takes Too Much Hydrochlorothiazide?

Hydrochlorothiazide overdose is uncommon, but it can happen when a person consumes too much of this medicine, whether intentionally, unintentionally, or by combining it with another prescription that intensifies the effects of the first poisoning.

The symptoms of Hydrochlorothiazide toxicity (HCTZ toxicity) are as follows:

• Nausea.

• Weakened muscles.

• Feeling thirsty and experiencing a parched mouth.

• Dizziness.

How to Manage Hydrochlorothiazide Toxicity?

Hydrochlorothiazide overdose can be managed in the following ways:

• Putting an end to drug usage.

• Maintaining an appropriate airway if required. This involves removing mucus secretions from the respiratory system and intubating an unconscious patient.

• Maintaining appropriate CO2 (carbon dioxide) elimination and oxygen consumption. Give oxygen as needed to maintain sufficient arterial oxygenation if respiration is low, and ventilate the patient if cyanosis (bluish skin discoloration due to inadequate oxygenation or poor blood circulation) or CO2 retention is evident.

• Keeping blood pressure constant. Establishing an intravenous line, starting fluids (saline or Ringer's lactate), and placing the patient in the Trendelenburg position (a medical position in which a patient lies on their back with the feet at an elevated level above the head) for hypovolemic shock (a medical emergency in which the body loses excessive blood or fluids which in turn makes it difficult for the heart to pump sufficient blood to the body).

• Dopamine or Norepinephrine should be administered if these precautions are insufficient.

• Keeping an eye on the hematocrit (the percentage of red blood cells in the body by volume) and whole blood count.

• Fluids must be cautiously administered to treat hemoconcentration (101.4 ounces intravenously or 135.2 ounces orally in 24 hours).

• Hyponatraemia (low sodium concentration in the serum) and hypokalaemia (low potassium concentration in the serum) are urgent risks, and ECG (electrocardiogram) monitoring is necessary. In addition, electrolyte abnormalities should be assessed and addressed.

• ECG, pulse, and blood pressure should be monitored to determine how the heart functions.

• Renal function should be monitored by measuring serum creatinine and urine output.

• The effects on the digestive system are often transient but may need symptomatic care.

Conclusion:

Hydrochlorothiazide is the drug most frequently used to treat swelling due to water retention and hypertension. Clinicians should be informed of the negative effects of HCTZ before prescribing it. Although the medication is generally safe, the patient's electrolyte balance has to be checked often. According to more recent research, Hydrochlorothiazide may not be as effective as other thiazide diuretics.