Endocrinology

Standard Treatment & Daily Medications

At a Glance

Classic 3β-HSD deficiency is treated with individualized hydrocortisone; salt-wasting forms may also need fludrocortisone and prescribed salt. Extra hydrocortisone is needed during illness or surgery, with an emergency injection if vomiting prevents oral medicine. Growth and lab tests guide dosing.

Managing 3β-HSD deficiency requires a careful balancing act. Because the body cannot produce enough cortisol (the energy hormone) or aldosterone (the salt-balancing hormone), daily replacement medications are required for classic cases ^[1]^[2]. The goal of treatment is to replace what is missing while keeping the precursor hormones under control—all while using the lowest effective dose to protect overall health and growth ^[3]^[4].

Medication Safety Warning: Never stop or abruptly change the dose of glucocorticoid medications. Doing so can trigger a life-threatening adrenal crisis. Always use the exact prescribed formulation and measuring device.

Daily Replacement Medications

Most individuals with the classic form of this condition require specific medications to stay healthy. Dosing is highly individualized by a specialist based on age, weight, and laboratory results.

Glucocorticoids (Hydrocortisone)

Hydrocortisone is the most common medication used because it is short-acting and closely mimics the body’s natural rhythm ^[5].

Dosing: It is typically given two or three times a day ^[6]^[5].
The Target: Your endocrinologist will determine the exact dose. Avoid comparing your dose to general CAH guidelines, as 3β-HSD deficiency requires highly specific, individualized monitoring ^[7]^[3].

Mineralocorticoids (Fludrocortisone)

For those with the salt-wasting form of 3β-HSD, fludrocortisone replaces the missing aldosterone ^[1]. (Note: Some partial or non-salt-wasting patients have residual adrenal function and may not require this).

Dosing: This is usually a small tablet given once or twice a day ^[8]^[7].
Monitoring: The doctor will monitor blood pressure, salt levels (electrolytes), and a marker called renin to ensure the dose is correct ^[9]^[10].

Sodium Chloride (Salt)

Infants with salt-wasting disease have a higher need for salt than older children and often cannot get enough from breast milk or formula alone ^[11].

Supplementation: Sodium chloride supplements are sometimes prescribed during the first year of life ^[12]^[10]. This must only be done when explicitly prescribed by a doctor. Incorrect salt concentration can cause serious electrolyte abnormalities. Never add salt independently without a prescription.

Stress Dosing for Illness and Surgery

In a healthy person, the body naturally produces extra cortisol during times of physical stress. Because this condition prevents that, you must provide “extra” hydrocortisone—a process called stress dosing ^[13]^[14].

When to Stress Dose: Common triggers include significant fever, persistent diarrhea, major trauma, or surgery ^[15]^[16].
Oral Dosing: Follow your individualized written action plan, which typically involves increasing the usual daily dose for a short period ^[15].
Emergency Injection: If vomiting occurs and oral medication cannot be kept down, an emergency injection of hydrocortisone (the IM kit) must be administered immediately to prevent a crisis ^[17]^[15].

Finding the “Goldilocks” Dose

In 3β-HSD deficiency, it might seem logical to use high doses of steroids to “shut down” the high levels of precursor hormones. However, the well-established harms of glucocorticoid overreplacement make this dangerous.

Risks of Overtreatment

Using too much hydrocortisone (iatrogenic overtreatment) can lead to:

Stunted Growth: Excessive steroids can severely slow down a child’s height gain ^[3]^[18].
Weight Gain and Bone Issues: Rapid weight gain and decreased bone density can occur ^[18]^[19].
Paradoxical Effects: Limited case-level evidence suggests that in 3β-HSD, very high doses of glucocorticoids may not improve control and could be associated with higher levels of certain sex steroids ^[20]. Accept that some Δ5-steroids may remain abnormal despite proper treatment.

Risks of Undertreatment

If the dose is too low, the precursor hormones can cause:

Accelerated Bone Age: Rapid early growth that leads to early bone maturation and a shorter adult height ^[21]^[22].
Early Puberty: Signs like early body hair or body odor ^[23].

Your medical team will use physical exams, growth charts, and specialized blood tests (LC-MS/MS) to ensure the dose stays in the “just right” range for your unique biology ^[23]^[24].

Common questions in this guide

What daily medicines are used for 3β-HSD deficiency?

Hydrocortisone replaces missing cortisol and is often taken two or three times a day. People with the salt-wasting form may also need fludrocortisone to replace aldosterone, while some partial or non-salt-wasting patients may not. Doses are individualized based on age, weight, growth, and laboratory results.

When should extra hydrocortisone be given?

Stress dosing is used when the body is under significant physical stress, such as a major fever, persistent diarrhea, serious injury, or surgery. Follow the written action plan from the endocrinology team because the amount and duration depend on the person's needs.

What should I do if vomiting prevents oral hydrocortisone?

If vomiting means oral medicine cannot be kept down, use the prescribed emergency intramuscular hydrocortisone injection immediately. Follow the written action plan because missed steroid replacement can become a life-threatening adrenal crisis.

Does everyone with 3β-HSD deficiency need fludrocortisone or salt supplements?

No. Fludrocortisone is mainly used for salt-wasting disease, while some people with partial or non-salt-wasting disease retain enough adrenal function not to need it. Infants with salt-wasting disease may be prescribed sodium chloride, but salt should never be added without exact medical instructions.

How do doctors know whether the steroid dose is too high or too low?

The team uses symptoms, physical examinations, growth charts, blood pressure, electrolytes, renin, and specialized hormone tests. Too much hydrocortisone can contribute to poor height gain, rapid weight gain, and bone problems, while too little can cause early body changes and accelerated bone age.

Why should I not increase hydrocortisone to normalize every hormone level?

Higher doses do not always improve precursor-hormone control in 3β-HSD deficiency and can cause glucocorticoid overreplacement. Some precursor steroid levels may remain abnormal even when treatment is appropriate, so the endocrinologist balances laboratory results with growth and overall health.

Get notified when new evidence is published on Congenital adrenal hyperplasia due to 3-beta-hydroxysteroid dehydrogenase deficiency.

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This page is for informational purposes only and does not constitute medical advice. Your endocrinology team must prescribe, adjust, and explain 3β-HSD deficiency medicines and emergency instructions for your specific situation.