| FIELD OF APPLICATION | DETAILS |
|---|---|
| Generic Name | Tienilic acid |
| Active Ingredient | Tienilic acid |
| Drug Category | Rheumatology |
| Drug Class | Palliative treatment, Immunosuppressive therapy, Targeted therapy |
| Brand Names | Diflurex / Selacryn / Ticrex |
| Dosage Forms | Not Available |
| Route of Administration | Not Available |
| FDA Approval Status | Withdrawn |
Tienilic acid: Overview
Tienilic acid, also known as ticrynafen, is a discontinued diuretic medication historically used to lower blood pressure. It belongs to a chemical class known as aryl-phenylketones and was notable for its ability to lower uric acid levels in the blood.
What Is Tienilic acid & How Does It Work?
Tienilic acid is a high-ceiling diuretic, meaning it strongly promotes the removal of excess water and salt from the body through the urine. By reducing the overall fluid volume in the blood vessels, it lowers high blood pressure. Unlike many other diuretic “water pills” that cause the body to retain uric acid, Tienilic acid is unique because it also acts as a uricosuric agent. This means it forces the kidneys to excrete uric acid into the urine, actively lowering uric acid levels in the bloodstream.
Is Tienilic acid FDA Approved?
No, Tienilic acid is not currently approved by the United States Food and Drug Administration. The drug was officially withdrawn from the US market in 1982 due to severe safety concerns regarding liver toxicity.
What Is Tienilic acid Used For?
During its time on the market, this medication was utilized in general medicine and rheumatology clinics to manage high blood pressure and related metabolic conditions.
- Primary treatment for hypertension (high blood pressure) to reduce fluid volume in the cardiovascular system.
- Targeted therapy to lower elevated uric acid levels in patients who required a diuretic but were at risk for gout.
- Palliative treatment to reduce edema (fluid retention) associated with various chronic conditions.
Before Taking Tienilic acid: Contraindications & Precautions
Because this medication is highly toxic to the liver, it is considered unsafe for any patient population. It was completely removed from the market to prevent further harm.
Who Should Not Take Tienilic acid?
- All patient populations, as the drug was withdrawn due to severe, life-threatening hepatotoxicity (liver damage).
- Individuals with a history of liver disease, hepatitis, or abnormal liver enzyme tests.
Tienilic acid: Pregnancy & Fertility
- The safety profile of this drug during pregnancy is obsolete; however, medications that cause severe liver toxicity are strictly contraindicated during pregnancy.
- Nursing mothers were historically advised against using this medication, as the risks of liver damage to both the mother and potentially the infant were too high.
Tell Your Doctor Before Taking Tienilic acid
- Disclose any history of previous exposure to withdrawn cardiovascular or diuretic medications.
- Mention if you have ever been diagnosed with drug-induced hepatitis or unexplained liver failure.
- Report any ongoing treatments for gout or high blood pressure so your doctor can prescribe safe, modern alternatives.
Tienilic acid: Dosage & Administration
Because the medication was banned and removed from pharmacy shelves in 1982, there are no valid or safe dosing instructions available for modern medical practice.
Standard Tienilic acid Dosing
- Standard dosing schedules are entirely obsolete and no longer applicable to modern medicine.
- Historically, the drug was administered in specific daily milligram amounts to manage blood pressure, but these guidelines are void.
How Tienilic acid Is Administered
- During its time on the market, the medication was administered orally.
- Safe administration routes are no longer established, as the drug is not manufactured or prescribed.
Tienilic acid: Clinical Efficacy & Research
During its initial clinical use, Tienilic acid was recognized as an effective antihypertensive agent. As a diuretic, it successfully lowered blood pressure by reducing fluid volume. Its dual action as a uricosuric agent made it particularly appealing for patients with hypertension who also suffered from gout, as standard diuretics often worsened gout by increasing uric acid levels. However, post-marketing research and clinical observations quickly revealed a fatal flaw in its safety profile. By 1982, numerous case reports in the United States directly linked ticrynafen to severe, drug-induced hepatitis. Because the risk of life-threatening liver damage vastly outweighed its benefits for blood pressure control, the FDA and international regulatory bodies mandated its complete withdrawal from the market.
Tienilic acid: Side Effects & Safety Profile
This medication does not have an FDA Black Box Warning. Because it was withdrawn from the market in 1982, long before the implementation of the modern boxed warning system, it does not carry a current warning label. However, global health authorities universally prohibit its use due to confirmed, severe hepatotoxicity.
The safety profile of this medication is exceptionally poor. The discovery of its severe liver toxicity led to its immediate and permanent removal from the public market.
Common Tienilic acid Side Effects
- Increased frequency of urination, typical of all diuretic medications
- Mild dehydration or increased thirst
- Occasional dizziness or lightheadedness when standing up quickly
Serious Tienilic acid Adverse Events
- Severe drug-induced hepatitis, causing inflammation and destruction of liver tissue
- Acute liver failure, characterized by jaundice (yellowing of the skin and eyes), severe abdominal pain, and dark urine
- Dangerous electrolyte imbalances, including significant potassium loss
Managing Tienilic acid Side Effects
Since the primary severe adverse event is life-threatening liver damage, there is no way to manage the side effects safely while taking the drug. Any historical exposure to such toxic compounds warrants routine preventative health and liver function screenings with a primary care physician.
Tienilic acid: Interactions & What to Avoid
As an obsolete medication, detailed modern interaction data is limited, but its nature as a Cytochrome P450 CYP2C9 inhibitor caused significant issues.
Tienilic acid: Interactions
- The drug was a known inhibitor of the CYP2C9 liver enzyme, which caused it to interact dangerously with blood thinners like warfarin, drastically increasing the risk of severe bleeding.
- Taking it alongside other blood pressure medications could cause an unsafe, compounding drop in blood pressure.
Tienilic acid: Food & Alcohol
- Alcohol consumption was strongly discouraged, as it placed additional stress on the liver and worsened dehydration.
- Patients were often advised to monitor their dietary potassium intake, as the diuretic effect caused the body to lose potassium.
Tienilic acid: Missed Dose, Overdose & Storage
Modern guidelines for handling this medication do not exist because it is illegal to manufacture or distribute it for patient care.
Missed Dose of Tienilic acid
Missed dose instructions are not applicable, as no patient should currently possess or be prescribed this medication.
Tienilic acid: Overdose & Emergency
An overdose of historical diuretics caused severe dehydration, life-threatening electrolyte imbalances, and extreme drops in blood pressure. Emergency medical intervention required immediate intravenous fluids and electrolyte replacement to stabilize the heart and kidneys.
How To Store Tienilic acid
This medication is not available for personal storage. Any remaining chemical samples of this compound are restricted to highly regulated, secure laboratory environments for chemical research purposes only.
Tienilic acid: Patient Management & Monitoring
Modern patient management focuses entirely on avoiding obsolete, dangerous drugs and utilizing current, heavily researched therapies for high blood pressure and gout.
Tests Before Starting Tienilic acid
- Pre-treatment testing is not applicable because this medication is never prescribed in modern clinical practice.
- Doctors will instead perform routine blood pressure checks and metabolic panels before prescribing a safe, modern diuretic.
Monitoring During Tienilic acid Treatment
- Active monitoring for this drug is obsolete.
- Patients who suspect they were exposed to hepatotoxic substances in the past should undergo regular liver enzyme tests (ALT and AST).
Tienilic acid: Do’s and Don’ts
- Do consult a licensed healthcare provider to manage high blood pressure and uric acid levels safely.
- Do use only modern, FDA-approved medications purchased from a reputable pharmacy.
- Don’t consume any vintage, expired, or unregulated medications found in older homes or unverified online sources.
- Don’t ignore signs of liver distress, such as unexplained yellowing of the eyes or severe abdominal pain.
Frequently Asked Questions
What was Tienilic acid used for?
Tienilic acid was historically prescribed to lower high blood pressure and reduce elevated levels of uric acid in the blood.
Why is Tienilic acid no longer available?
It was permanently withdrawn from the market in 1982 after researchers discovered it caused severe, life-threatening liver damage (hepatitis).
How did Tienilic acid lower blood pressure?
It worked as a diuretic, meaning it forced the kidneys to remove excess water and salt from the body through the urine, which decreased the fluid volume in the blood vessels.
Is Tienilic acid safe to take for gout?
No, it is highly unsafe and is no longer approved or legally available for medical use anywhere in the United States.
What does hepatotoxic mean regarding this drug?
Hepatotoxic means that the drug is poisonous or highly damaging to the liver, which was the primary reason it was banned.
What should I take instead of Tienilic acid?
You should consult your doctor, who can prescribe modern, safe, and legally approved blood pressure medications or gout treatments suited for your specific needs.
Did Tienilic acid interact with other drugs?
Yes, it inhibited specific liver enzymes, which made it highly dangerous to take with other medications like blood thinners.
References
- DrugBank Online Database. Tienilic acid Compound Summary.
- Classyfire Chemical Taxonomy Database. Aryl-phenylketones.
Legal Disclaimer
The information provided is for educational and informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider at any hospital or any local clinic before starting or stopping any medication.
