Lonapegsomatropin-Tcgd: uses, dosing, side effects & brands
Lonapegsomatropin-Tcgd is a medicine sold in the U.S. under one brand, for septo-optic dysplasia. Below: what the FDA label says, every product that contains it, what the pills look like, and its recall record.
Key facts
- Treats
- Septo-Optic Dysplasia
- Available as
- Injectable
- Sold as
- Skytrofa
- Prescription?
- Prescription only
- Generic available?
- Not in our catalog
How lonapegsomatropin-tcgd is dosed
From the FDA label for Skytrofa (application BLA761177). Other lonapegsomatropin-tcgd products — different forms, different strengths — are dosed differently. Follow the label for the one you were prescribed.
SKYTROFA should be administered subcutaneously once weekly into the abdomen, buttock, or thigh with regular rotation of the injection sites ( 2.7 ). Pediatric Patients: Recommended dose is 0.24 mg/kg body weight once weekly ( 2.2 ). Adults: Recommended starting dose is based on age and concomitant use of oral estrogen. Titrate monthly until the desired clinical response and/or weekly average IGF-1 concentration are achieved ( 2.3 ). See Full Prescribing Information for instructions on preparation and administration of drug ( 2.5 , 2.6 , 2.7 ). 2.1 General Dosing Information For subcutaneous injection, once weekly. Therapy with SKYTROFA should be supervised by a healthcare provider who is experienced in the diagnosis and management of patients with growth hormone deficiency (GHD). Perform fundoscopic examination before initiating treatment with SKYTROFA to exclude preexisting papilledema. If papilledema is identified, evaluate the etiology and treat the underlying cause before initiating treatment with SKYTROFA [see Warnings and Precautions (5.5) ] . 2.2 Recommended Dosage for Pediatric Patients The recommended dose of SKYTROFA for treatment-naïve patients and patients switching from another growth hormone product is 0.24 mg/kg body weight, given once weekly. Individualize and titrate the dosage of SKYTROFA based on response. When changing from daily somatropin therapy to…
Lonapegsomatropin-Tcgd side effects
The following important adverse reactions are described elsewhere in the labeling: Increased mortality in patients with acute critical illness [see Warnings and Precautions (5.1) ] Severe hypersensitivity [see Warnings and Precautions (5.2) ] Increased risk of neoplasms [see Warnings and Precautions (5.3) ] Glucose intolerance and diabetes mellitus [see Warnings and Precautions (5.4) ] Intracranial hypertension [see Warnings and Precautions (5.5) ] Fluid retention [see Warnings and Precautions (5.6) ] Hypoadrenalism [see Warnings and Precautions (5.7) ] Hypothyroidism [see Warnings and Precautions (5.8) ] Slipped capital femoral epiphysis in pediatric patients [see Warnings and Precautions (5.9) ] Progression of preexisting scoliosis in pediatric patients [see Warnings and Precautions (5.10) ] Pancreatitis [see Warnings and Precautions (5.11) ] Lipoatrophy [see Warnings and Precautions (5.12) ] Sudden death in pediatric patients with Prader-Willi syndrome [see Warnings and Precautions (5.13) ] Pediatric Patients: Most common adverse reactions (≥ 5%): viral infection, pyrexia, cough, nausea and vomiting, hemorrhage, diarrhea, abdominal pain, and arthralgia and arthritis ( 6.1 ). Adults: Most common adverse reaction (≥ 5%): edema peripheral ( 6.1 ). To report SUSPECTED ADVERSE REACTIONS, contact Ascendis Pharma Endocrinology, Inc., at 1-844-442-7236 or FDA at 1-800-FDA-1088 or…
Who shouldn’t take lonapegsomatropin-tcgd
SKYTROFA is contraindicated in patients with: Acute critical illness after open heart surgery, abdominal surgery or multiple accidental trauma, or those with acute respiratory failure due to the risk of increased mortality with use of pharmacologic doses of somatropin [see Warnings and Precautions (5.1) ] . Hypersensitivity to somatropin or any of the excipients in SKYTROFA. Severe systemic hypersensitivity reactions, including anaphylactic reactions and angioedema, have been reported [see Warnings and Precautions (5.2) ]. Pediatric patients with closed epiphyses. Active malignancy due to the risk of malignancy progression [see Warnings and Precautions (5.3) ]. Active proliferative or severe non-proliferative diabetic retinopathy because treatment with somatropin may worsen this condition. Pediatric patients with Prader-Willi syndrome who are severely obese, have a history of upper airway obstruction or sleep apnea or have severe respiratory impairment due to the risk of sudden death [see Warnings and Precautions (5.13) ]. Acute critical illness ( 4 ) Hypersensitivity to somatropin or any of the excipients in SKYTROFA ( 4 ) Children with closed epiphyses ( 4 ) Active malignancy ( 4 ) Active proliferative or severe non-proliferative diabetic retinopathy ( 4 ) Children with Prader-Willi syndrome who are severely obese or have severe respiratory impairment due to risk of sudden death ( 4 )
Lonapegsomatropin-Tcgd drug interactions
Table 4 includes a list of drugs with clinically important drug interactions when administered concomitantly with SKYTROFA and instructions for preventing or managing them. Table 4: Clinically Important Drug Interactions with SKYTROFA Replacement Glucocorticoid Treatment Clinical Impact: Microsomal enzyme 11β-hydroxysteroid dehydrogenase type 1 (11βHSD-1) is required for conversion of cortisone to its active metabolite, cortisol, in hepatic and adipose tissue. Somatropin inhibits 11βHSD-1. Consequently, individuals with untreated growth hormone deficiency (GHD) have relative increases in 11βHSD-1 and serum cortisol. Initiation of SKYTROFA may result in inhibition of 11βHSD-1 and reduced serum cortisol concentrations. Intervention: Patients treated with glucocorticoid replacement for hypoadrenalism may require an increase in their maintenance or stress doses following initiation of SKYTROFA [see Warnings and Precautions (5.7) ] Examples Cortisone acetate and prednisone may be affected more than others because conversion of these drugs to their biologically active metabolites is dependent on the activity of 11βHSD-1. Pharmacologic Glucocorticoid Therapy and Supraphysiologic Glucocorticoid Treatment Clinical Impact: Pharmacologic glucocorticoid therapy and supraphysiologic glucocorticoid treatment may attenuate the growth-promoting effects of SKYTROFA in pediatric patients. Intervention: Carefully adjust glucocorticoid replacement dosing in pediatric patients receiving glucocorticoid treatments to avoid both hypoadrenalism and an inhibitory effect on growth. Cytochrome P450-Metabolized Drugs Clinical Impact: Limited published data indicate that somatropin treatment increases cytochrome P450 (CYP450)-mediated antipyrine clearance. SKYTROFA may alter the clearance of compounds known to be metabolized by CYP450 liver enzymes. Intervention: Careful monitoring is advisable when SKYTROFA is administered in combination with drugs metabolized by CYP450 liver enzymes. Oral Estrogen Clinical Impact: Oral estrogens may reduce the serum insulin-like growth factor-1 (IGF-1) response to SKYTROFA. Intervention: Patients receiving oral estrogen replacement may require higher SKYTROFA dosages. Insulin and/or Other Antihyperglycemic Agents Clinical Impact: Treatment with SKYTROFA may decrease insulin sensitivity, particularly at higher doses. Intervention: Patients with diabetes mellitus may require adjustment of their doses of insulin and/or other antihyperglycemic agents [see Warnings and Precautions (5.4) ] . Replacement Glucocorticoid Treatment: Patients treated with glucocorticoid for hypoadrenalism may require an increase in their maintenance or stress doses following initiation of SKYTROFA ( 7 ). Pharmacologic Glucocorticoid Therapy and Supraphysiologic Glucocorticoid Treatment: Adjust glucocorticoid dosing in pediatric patients to avoid both hypoadrenalism and an inhibitory effect on growth ( 7 ). Cytochrome P450-Metabolized Drugs: SKYTROFA may alter the clearance. Monitor carefully if used with SKYTROFA ( 7 ). Oral Estrogen: Larger doses of SKYTROFA may be required ( 7 ). Insulin and/or Other Antihyperglycemic Agents: Dose adjustment of insulin or antihyperglycemic agent may be required ( 7 ).
Every lonapegsomatropin-tcgd product we track (1)
Same active ingredient — different manufacturer, form, price and FDA recall record. That last one is what our independent score measures.
Only one: Skytrofa.
What people report to the FDA about lonapegsomatropin-tcgd
The FDA Adverse Event Reporting System (FAERS) collects reports from patients and clinicians. It holds 3 reports naming lonapegsomatropin-tcgd, and the FDA flagged 67% of those reports as serious. The effects reported most often — leaving out reports about overdose, misuse or the condition being treated, which dominate the raw list for common medicines:
- dry skin1 reports
- gastrointestinal disorder1 reports
- hyperglycaemia1 reports
- injection site pain1 reports
- intracranial pressure increased1 reports
- pruritus1 reports
- skin fissures1 reports
Read these as a signal, not a rate. A report does not mean lonapegsomatropin-tcgd caused the effect — anyone can file one, and many describe people taking several medicines for several conditions. Crucially there is no denominator: FAERS does not record how many people took the drug, so these counts cannot be turned into “X% of patients” — a bigger number often just means a more widely used or more talked-about drug. Duplicates exist, and publicity drives reporting. For what is actually established, read the FDA label section above.
Source: openFDA drug/event (FAERS), retrieved July 25, 2026.
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Frequently asked questions
What is lonapegsomatropin-tcgd?
Skytrofa (Lonapegsomatropin-Tcgd) is a medication used to treat Septo-Optic Dysplasia.
Can you take lonapegsomatropin-tcgd with other medicines?
It depends on the medicine. We check it against the FDA labels rather than guessing: our interaction checker searches each drug's own label for the other and quotes what it says, naming the section it came from. Run lonapegsomatropin-tcgd against whatever else you take — and remember that a label not naming a drug is not the same as that combination being safe.
What forms does lonapegsomatropin-tcgd come in?
Across the brands we track, lonapegsomatropin-tcgd is currently marketed as injectable, per the FDA's National Drug Code Directory. Each form is dosed differently — follow the label for the exact product you were prescribed.
Is there a generic lonapegsomatropin-tcgd?
We do not currently list a generic-labelled lonapegsomatropin-tcgd product. That does not always mean none exists — it means none appears under a generic name in the FDA data we track. Ask your pharmacist.
Cite this page
- APA
- pharmaranks. (2026, July 24). Lonapegsomatropin-Tcgd: uses, dosing, side effects & brands. https://pharmaranks.com/drugs/lonapegsomatropin-tcgd
- MLA
- “Lonapegsomatropin-Tcgd: uses, dosing, side effects & brands.” pharmaranks, 24 July 2026, https://pharmaranks.com/drugs/lonapegsomatropin-tcgd.
We summarise public FDA and NIH sources — for a clinical claim, cite the primary source we link to as well.
Sources: FDA openFDA drug label, National Drug Code Directory, and Enforcement (recall) database. This page reproduces public FDA data and is not medical advice. Dosing is set by your prescriber.
Read the full FDA label for lonapegsomatropin-tcgd on DailyMed (NIH) ↗.