Long-acting testosterone ester
Testosterone undecanoate
Brand names: Nebido, Restandol Testocaps
Adult dose
Dose: IM (Nebido): 1g every 10–14 weeks. PO (Restandol): 120–160mg/day in 2 divided doses
Route: IM/PO
Frequency: q10-14w (IM)
Clinical pearls
- Male hypogonadism
- Inject slowly over 2 minutes; observe 30 min for POME
Contraindications
- Prostate / breast cancer
- Pregnancy
- Hypercalcaemia
- Severe hepatic/cardiac impairment
Side effects
- Polycythaemia
- Pulmonary oil microembolism (POME — IM)
- Mood changes
- Prostate effects
- Sleep apnoea
Interactions
- Anticoagulants
- Insulin
- Corticosteroids
Monitoring
- Testosterone
- PSA
- Hct
- LFTs
Reference: BNF; UK Endocrine Society; MHRA; https://bnf.nice.org.uk/drugs/testosterone-undecanoate/. Verify against your local formulary and the latest BNF before prescribing.
Related
Curated clinical cross-links plus same-class fallbacks.
Calculators
Pathways
- Diabetic Ketoacidosis (DKA) · JBDS 2013 / Joint British Diabetes Societies; NICE NG17
- Adult Hypoglycaemia (Treated Diabetes) · JBDS-IP (2023): Hospital Management of Hypoglycaemia
- Adrenal Crisis · Society for Endocrinology Emergency Guidance (2024)
- Type 2 Diabetes Management · NICE NG28 2022
- Hyperthyroidism Management · BTA / ETA 2018
- Adrenal Insufficiency · Society of Endocrinology / ESE 2016