Definition

Noun A synthetic sulfonamide-derived compound used primarily as a long-acting diuretic and antihypertensive medication. It promotes the excretion of water and sodium by the kidneys, thereby reducing fluid volume and lowering blood pressure.

Usage and Examples

• Primary Medical Use: Chlorthalidone is prescribed to manage hypertension (high blood pressure).
  • Example: The doctor added chlorthalidone to her treatment regimen to better control her blood pressure.
• Secondary Medical Use: It is also used to treat edema (fluid retention) associated with conditions like congestive heart failure or kidney disorders.
  • Example: The patient's edema improved significantly after starting chlorthalidone.

Advanced Usage Notes

• Pharmacological Class: Chlorthalidone is classified as a thiazide-like diuretic. It is often noted for its long duration of action, which can provide 24-hour blood pressure control with once-daily dosing.
• Therapeutic Context: In clinical guidelines, chlorthalidone is frequently cited as a first-line or recommended agent for the initial management of uncomplicated hypertension.

Variants and Related Words

• Trade Names: The word is the generic (non-proprietary) name. Common brand names under which it is sold include Hygroton and Thalidone.
  • Example: The prescription was written for the generic chlorthalidone, but the pharmacy also carries it under the brand name Hygroton.

Synonyms and Related Terms

• Diuretic: A general term for a substance that increases urine production. Chlorthalidone is a specific type of diuretic.
• Antihypertensive: A substance that lowers high blood pressure. This describes one of chlorthalidone's primary functions.
• Thiazide-like diuretic: A more precise pharmacological synonym describing its mechanism and chemical similarity to thiazide diuretics.

Important Notes (Not Idioms or Phrasal Verbs)

• Clinical Note: As a potent diuretic, chlorthalidone can cause electrolyte imbalances (e.g., low potassium, low sodium). Medical supervision is required.
• Historical Context: The suffix "-thalidone" is distinct. It is crucial to note that chlorthalidone is not chemically or functionally related to the drug thalidomide, despite the superficial similarity in name.

Noun

1. a diuretic (trade names Hygroton and Thalidone) used to control hypertension and conditions that cause edema; effective in lowering blood pressure to prevent heart attacks