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PubMed This is a summary of 19 peer-reviewed journal articles Updated
Endocrinology · Classic Salt-Wasting Congenital Adrenal Hyperplasia

Daily Medications: The Balancing Act of CAH Treatment

At a Glance

Treating classic salt-wasting CAH requires a careful balance of daily hydrocortisone, fludrocortisone, and salt supplements. Pediatric endocrinologists monitor your child's growth and blood tests to ensure they receive enough medication to control the condition without causing side effects.

Managing Classic Salt-Wasting CAH is often described as a balancing act. Because your child’s body cannot produce its own cortisol or aldosterone, we must provide them through daily medications. The goal is to give exactly enough to replace what is missing without giving so much that it causes side effects [1][2].

The Three Essential Components

For an infant with the salt-wasting form of CAH, the daily regimen typically includes three parts [3]:

  1. Hydrocortisone (The Glucocorticoid): This replaces the missing cortisol. In growing children, hydrocortisone is the preferred medication because it is short-acting and less likely to interfere with growth than longer-acting steroids like dexamethasone or prednisone [4][5]. It is usually given 3 times a day to mimic the body’s natural rhythm [6].
  2. Fludrocortisone (The Mineralocorticoid): This replaces the missing aldosterone. It tells the kidneys to hold onto salt and keep blood pressure stable [7][8].
  3. Sodium Chloride (Salt Supplementation): Newborns and infants have very high salt needs because their kidneys are still maturing. Doctors often prescribe extra salt (as a liquid or powder) to be added to formula or breast milk, usually during the first year of life [9][10].

Managing Missed or Delayed Doses

In the chaos of raising an infant, missed or delayed doses will happen. Generally:

  • If you miss a dose by an hour or two, give it as soon as you remember.
  • If it is almost time for the next dose, skip the missed dose and resume the normal schedule.
  • Do not “double up” on doses to catch up unless explicitly instructed by your endocrinologist.
    Always ask your doctor for their specific protocol regarding missed doses [11].

The Balancing Act

Your medical team will constantly adjust these doses as your child grows. They are looking for a “Goldilocks” zone—not too much, and not too little [1].

If the Dose is Too Low (Under-treatment) If the Dose is Too High (Over-treatment)
Androgen Excess: The “assembly line” continues to overproduce male-type hormones [12]. Glucocorticoid Excess: The body begins to show signs of too much steroid, sometimes called Cushingoid features [1].
Signs: Rapid growth spurts followed by early closure of growth plates; premature pubic hair or body odor; advanced bone age (bones looking older on X-ray than the child’s actual age) [1][13]. Signs: Stunted growth (slowing down on the height chart); rapid or excessive weight gain; a “moon-shaped” face; and high blood pressure [1][14].

How Success is Monitored

To keep your child in the “balanced” zone, your endocrinologist will use several tools [15][16]:

  • Growth Charts: This is the most important tool. A steady, predictable climb in height is the best sign that the medication dose is correct [15].
  • Blood Tests: Labs will measure 17-hydroxyprogesterone (17-OHP) and androstenedione. The goal is not to bring these levels to zero, but to keep them in a “mildly elevated” range to ensure we aren’t over-treating [17][18].
  • Renin Levels: This blood test checks if the body is still “thirsty” for salt, helping the doctor adjust the fludrocortisone dose [7].
  • Bone Age X-rays: Every year or two, the doctor may X-ray your child’s hand and wrist to make sure their bones are developing at the right speed [1].

By staying consistent with the daily routine and attending regular check-ups, you provide the stability your child needs to thrive [19].

Return to Home Page

Common questions in this guide

Why is hydrocortisone given three times a day for CAH?
Hydrocortisone is given three times a day to closely mimic the body's natural cortisol production rhythm. It is a short-acting medication, making it less likely to interfere with a growing child's height compared to longer-acting steroids.
What happens if a child receives too much CAH medication?
If the steroid dose is too high, a child may experience stunted growth, excessive weight gain, high blood pressure, and develop a round face. Doctors carefully monitor height and weight to ensure the medication dose is perfectly balanced.
What are the signs of under-treatment in CAH?
Under-treating CAH leads to an excess of male-type hormones. This can cause rapid initial growth spurts that lead to early closure of the growth plates, premature pubic hair, and bones that look older on X-rays than the child's actual age.
At what age do babies stop needing extra salt supplements for CAH?
Newborns and infants with salt-wasting CAH typically need extra sodium chloride added to their formula or breast milk during their first year of life. As their kidneys mature, doctors usually stop the extra salt supplementation.
How will my doctor know if my child's CAH medication dose is correct?
Pediatric endocrinologists use growth charts, bone age X-rays, and blood tests checking 17-OHP, androstenedione, and renin levels. A steady, predictable climb on the growth chart is the best sign that the medication dose is correct.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Why is hydrocortisone given three times a day instead of just once or twice?
  2. 2.What are our specific target ranges for 17-OHP and androstenedione on my child's labs?
  3. 3.How often should we be checking my baby's blood pressure while they are on fludrocortisone?
  4. 4.At what age do you typically stop the extra sodium chloride (salt) supplementation?
  5. 5.How will we know if the current dose is starting to affect my child's growth or bone age?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (19)
  1. 1

    Management challenges and therapeutic advances in congenital adrenal hyperplasia.

    Mallappa A, Merke DP

    Nature reviews. Endocrinology 2022; (18(6)):337-352 doi:10.1038/s41574-022-00655-w.

    PMID: 35411073
  2. 2

    Congenital adrenal hyperplasia.

    El-Maouche D, Arlt W, Merke DP

    Lancet (London, England) 2017; (390(10108)):2194-2210 doi:10.1016/S0140-6736(17)31431-9.

    PMID: 28576284
  3. 3

    Congenital adrenal hyperplasia with salt-wasting crisis and arrhythmia: a case study.

    Canlas JF, Ponmani C

    BMJ case reports 2019; (12(1)) doi:10.1136/bcr-2018-227565.

    PMID: 30700462
  4. 4

    Prednisolone impairs trabecular bone score changes in adolescents with 21-hydroxylase deficiency.

    Wiromrat P, Raruenrom Y, Namphaisan P, et al.

    Clinical and experimental pediatrics 2025; (68(3)):238-246 doi:10.3345/cep.2024.01060.

    PMID: 39533718
  5. 5

    Effect of complete suppression of androstenedione on auxological development in prepubertal patients with classical congenital adrenal hyperplasia.

    Debor B, Bechtold-Dalla Pozza S, Reisch N, et al.

    Journal of pediatric endocrinology & metabolism : JPEM 2023; (36(10)):930-940 doi:10.1515/jpem-2023-0169.

    PMID: 37650550
  6. 6

    Developing oral chronotherapy for cortisol replacement in congenital adrenal hyperplasia.

    Whitaker MJ, Debono M, Ross RJ

    Clinical endocrinology 2024; (101(4)):311-317 doi:10.1111/cen.14976.

    PMID: 37767979
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    Mineralocorticoid replacement therapy in salt-wasting congenital adrenal hyperplasia.

    Lang K, Quinkler M, Kienitz T

    Clinical endocrinology 2024; (101(4)):346-358 doi:10.1111/cen.14959.

    PMID: 37564007
  8. 8

    A Case of Salt-Wasting 21-Hydroxylase Deficiency With Resistance to Aldosterone due to Urinary Tract Infection.

    Shimakawa U, Shigehara K, Kawabe Y, et al.

    Cureus 2020; (12(11)):e11763 doi:10.7759/cureus.11763.

    PMID: 33409011
  9. 9

    Sodium Chloride Supplementation Is Not Routinely Performed in the Majority of German and Austrian Infants with Classic Salt-Wasting Congenital Adrenal Hyperplasia and Has No Effect on Linear Growth and Hydrocortisone or Fludrocortisone Dose.

    Bonfig W, Roehl F, Riedl S, et al.

    Hormone research in paediatrics 2018; (89(1)):7-12 doi:10.1159/000481775.

    PMID: 29073619
  10. 10

    Treatment of congenital adrenal hyperplasia in children aged 0-3 years: a retrospective multicenter analysis of salt supplementation, glucocorticoid and mineralocorticoid medication, growth and blood pressure.

    Neumann U, van der Linde A, Krone RE, et al.

    European journal of endocrinology 2022; (186(5)):587-596 doi:10.1530/EJE-21-1085.

    PMID: 35290211
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    Adrenal insufficiency.

    Husebye ES, Pearce SH, Krone NP, Kämpe O

    Lancet (London, England) 2021; (397(10274)):613-629 doi:10.1016/S0140-6736(21)00136-7.

    PMID: 33484633
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    MECHANISMS IN ENDOCRINOLOGY: Rare defects in adrenal steroidogenesis.

    Miller WL

    European journal of endocrinology 2018; (179(3)):R125-R141.

    PMID: 29880708
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    Screening for testicular adrenal rest tumors among children with congenital adrenal hyperplasia at King Fahad Medical City, Saudi Arabia.

    Huneif MA, Al Mutairi M, AlHazmy ZH, et al.

    Journal of pediatric endocrinology & metabolism : JPEM 2022; (35(1)):49-54 doi:10.1515/jpem-2021-0291.

    PMID: 34757702
  14. 14

    Manipulation of Hydrocortisone Tablets Leads to Iatrogenic Cushing Syndrome in a 6-Year-Old Girl With CAH.

    Al-Rayess H, Fleissner K, Jaber M, et al.

    Journal of the Endocrine Society 2020; (4(8)):bvaa091 doi:10.1210/jendso/bvaa091.

    PMID: 32803093
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    Clinical Manifestations and Treatment Challenges in Infants and Children With Classic Congenital Adrenal Hyperplasia Due to 21-Hydroxylase Deficiency.

    Nokoff NJ, Buchanan C, Barker JM

    The Journal of clinical endocrinology and metabolism 2025; (110(Supplement_1)):S13-S24 doi:10.1210/clinem/dgae563.

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    Treatment and Follow-up of Congenital Adrenal Hyperplasia Due to 21-hydroxylase Deficiency in Childhood and Adolescence

    Peltek Kendirci HN, Ünal E, Dündar İ, et al.

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    Analysis of therapy monitoring in the International Congenital Adrenal Hyperplasia Registry.

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    Adrenal adenoma secreting 17-hydroxyprogesterone mimicking non-classical 21-hydroxylase deficiency.

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    Elective Reconstruction for Children With Congenital Adrenal Hyperplasia: Evaluating Association of Familial Characteristics.

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This page provides educational information about CAH medications. Always consult your pediatric endocrinologist before adjusting any medication doses or schedules for your child.

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