Hormone Therapy

Key takeaways

• This category treats one measurable hormone problem, not general wellbeing: testosterone (low testosterone), enclomiphene (fertility-sparing alternative), cabergoline (high prolactin), fludrocortisone (adrenal salt loss), and desmopressin and tolvaptan (opposite ends of water balance).
• Testosterone replaces the hormone directly; enclomiphene pushes the pituitary to make more of it, so it doesn't suppress sperm production the way testosterone can.
• Desmopressin adds antidiuretic hormone activity; tolvaptan blocks that same receptor, so the two treat opposite fluid-balance problems.
• All six require blood tests before and during treatment. Tolvaptan carries a boxed warning for liver injury, and its sodium correction has to be gradual: correcting it too fast can cause lasting brain injury.

How hormone therapy works

Each drug targets one signaling pathway: replacing a missing hormone (testosterone, fludrocortisone, desmopressin), blocking an overactive one (tolvaptan, cabergoline), or prompting a gland to make more on its own (enclomiphene). Dosing follows blood levels rather than symptoms, so baseline and follow-up tests are standard.

Choosing between testosterone, enclomiphene, cabergoline, fludrocortisone, desmopressin and tolvaptan

• Testosterone replaces the hormone in men with a confirmed low level (hypogonadism), given as injections, gels or patches. It needs regular PSA, hematocrit and lipid checks, since it can raise red blood cell counts and shift prostate and cardiovascular risk markers.
• Enclomiphene is an oral option that blocks estrogen's feedback signal to the pituitary, prompting the body to raise its own testosterone. Unlike testosterone therapy, it doesn't shut down sperm production, making it the choice when fertility matters.
• Cabergoline lowers prolactin in hyperprolactinemia and prolactin-secreting pituitary tumors, taken just once or twice a week. Long-term, higher-dose use has been linked to heart valve damage, so extended treatment includes periodic cardiac checks.
• Fludrocortisone is a mineralocorticoid that replaces aldosterone in adrenal insufficiency (Addison's disease), taken once daily. It raises blood pressure and lowers potassium, so both need periodic monitoring.
• Desmopressin is a synthetic version of antidiuretic hormone used for diabetes insipidus and bedwetting, taken as a tablet, melt or nasal spray. Drinking too much fluid alongside it can push sodium dangerously low and, in severe cases, trigger seizures.
• Tolvaptan blocks that same hormone's receptor to clear excess water in low-sodium conditions like SIADH and to slow cyst growth in autosomal dominant polycystic kidney disease. It carries a boxed warning for liver injury, so early doses are usually given in hospital, and sodium must rise gradually: correcting it too fast risks permanent brain injury.

Common questions

Is hormone therapy the same as a supplement?

No. These are prescription drugs dosed against a measured blood level or a diagnosed deficiency, not general boosters. Taking one without a confirmed low or high result can push a normal hormone level out of range.

Can I stop suddenly if I feel fine?

Not with fludrocortisone or long-term testosterone. Stopping fludrocortisone abruptly can trigger an adrenal crisis, and stopping testosterone suddenly can cause withdrawal symptoms. Ask your prescriber how to taper.

Safety essentials

• Tolvaptan needs baseline and repeated liver function tests, hospital-supervised initiation, and slow sodium correction, since rapid correction can cause serious, irreversible neurological injury.
• Testosterone needs baseline and periodic PSA, hematocrit and lipid checks, and it isn't appropriate for age-related decline without a confirmed diagnosis.
• Desmopressin requires guidance on fluid intake to avoid water intoxication and hyponatremia, particularly in children and older adults.
• Cabergoline needs periodic heart valve assessment with long-term, higher-dose use.
• Seek urgent care for confusion, severe headache, seizures or fainting while on desmopressin or tolvaptan: these can signal a dangerous sodium shift.

This page is educational and does not replace advice from a doctor or pharmacist who knows your health history.