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omlyclo

Omlyclo (Omalizumab-Igec) is a medication used to treat Asthma.

Omalizumab-Igec · by Celltrion Inc

Not yet rated· sourced from the FDA label
Rated against independent regulatory sources·Last updated June 7, 2026·How we rate
Verified againstopenFDANIH DailyMedRxClass

Key facts

Active ingredient
Omalizumab-Igec
Form
Injectable
Strength
OMALIZUMAB-IGEC 150MG/ML · OMALIZUMAB-IGEC 300MG/2ML · OMALIZUMAB-IGEC 75MG/0.5ML
Type
Prescription (Rx)
Brand or generic
Brand-name
May treat
asthma
Manufacturer
Celltrion Inc
FDA application
BLA761399

What is Omlyclo?

From the FDA label:Omalizumab-igec is a recombinant DNA-derived humanized IgG1κ monoclonal antibody that selectively binds to human immunoglobulin E (IgE). The antibody has a molecular weight of approximately 149 kiloDaltons. OMLYCLO is produced by a Chinese hamster ovary cell suspension culture. OMLYCLO (omalizumab-igec) is administered as a subcutaneous (SC) injection and is available in prefilled syringes. OMLYCLO Injection (Prefilled Syringe) OMLYCLO (omalizumab-igec) injection is supplied as a sterile, preservative-free, clear to opalescent and colorless to pale brownish-yellow solution for subcutaneous injection. OMLYCLO (omalizumab-igec) injection is available as a single-dose prefilled syringe. Each 75 mg prefilled syringe delivers 75 mg omalizumab-igec in 0.5 mL and contains arginine hydrochloride (21.065 mg), histidine (0.685 mg), L-histidine hydrochloride monohydrate (1.17 mg), and polysorbate 20 (0.2 mg) in Water for Injection (WFI), USP. The pH of the product is 6.0. Each 150 mg prefilled syringe delivers 150 mg omalizumab-igec in 1 mL and contains arginine hydrochloride (42.13 mg), histidine (1.37 mg), L-histidine hydrochloride monohydrate (2.34 mg), and polysorbate 20 (0.4 mg) in WFI, USP. The pH of the product is 6.0. Each 300 mg prefilled syringe delivers 300 mg omalizumab-igec in 2 mL and contains arginine hydrochloride (84.26 mg), histidine (2.74 mg), L-histidine hydrochloride…

How to use

For subcutaneous (SC) administration only. ( 2.2 , 2.3 , 2.4 , 2.5 ) See full prescribing information for administration instructions ( 2.6 , 2.7 ). Asthma: OMLYCLO 75 to 375 mg SC every 2 or 4 weeks. Determine dose (mg) and dosing frequency by serum total IgE level (IU/mL), measured before the start of treatment, and body weight (kg). See the dose determination charts. ( 2.2 ) Chronic Rhinosinusitis with Nasal Polyps : OMLYCLO 75 to 600 mg SC every 2 or 4 weeks. Determine dose (mg) and dosing frequency by serum total IgE level (IU/mL), measured before the start of treatment, and body weight (kg). See the dose determination charts. ( 2.3 ) IgE-Mediated Food Allergy : OMLYCLO 75 mg to 600 mg SC every 2 or 4 weeks. Determine dose (mg) and dosing frequency by serum total IgE level (IU/mL), measured before the start of treatment, and body weight (kg). See the dose determination chart. ( 2.4 ) Chronic Spontaneous Urticaria : OMLYCLO 150 or 300 mg SC every 4 weeks. Dosing in CSU is not dependent on serum IgE level or body weight. ( 2.5 ) 2.1 Overview of Dosage Determination Asthma, and Chronic Rhinosinusitis with Nasal Polyps, and IgE-Mediated Food Allergy Determine dosage of OMLYCLO by serum total IgE level (IU/mL) measured before the start of treatment, and by body weight (kg). For patients with asthma, chronic rhinosinusitis with nasal polyps (CRSwNP), and IgE-mediated food…

Side effects

The following clinically significant adverse reactions are described elsewhere in the labeling: Anaphylaxis [see Boxed Warning and Warnings and Precautions (5.1) ] Malignancies [see Warnings and Precautions (5.2) ] Asthma: The most common adverse reactions (≥ 1% of patients) in clinical studies with adult and adolescent patients ≥12 years of age were arthralgia, pain (general), leg pain, fatigue, dizziness, fracture, arm pain, pruritus, dermatitis, and earache. In clinical studies with pediatric patients 6 to <12 years of age, the most common adverse reactions (≥ 3% of patients) were nasopharyngitis, headache, pyrexia, upper abdominal pain, pharyngitis streptococcal, otitis media, viral gastroenteritis, arthropod bites, and epistaxis. ( 6.1 ) Chronic Rhinosinusitis with Nasal Polyps : The most common adverse reactions (≥ 3% of patients) in clinical studies with adult patients included the following: headache, injection site reaction, arthralgia, upper abdominal pain, and dizziness. ( 6.1 ) IgE-Mediated Food Allergy: The most common adverse reactions (≥3% of patients) were injection site reactions and pyrexia. ( 6.1 ) Chronic Spontaneous Urticaria: The most common adverse reactions (≥2% of patients) included the following: nausea, nasopharyngitis, sinusitis, upper respiratory tract infection, viral upper respiratory tract infection, arthralgia, headache, and cough. ( 6.1 ) To…

FDA Boxed Warning (the FDA’s most serious warning)

Boxed (black-box) warning — from the FDA label

Anaphylaxis presenting as bronchospasm, hypotension, syncope, urticaria, and/or angioedema of the throat or tongue, has been reported to occur after administration of omalizumab products. Anaphylaxis has occurred as early as after the first dose of omalizumab products, but also has occurred beyond 1 year after beginning regularly administered treatment. Because of the risk of anaphylaxis, initiate OMLYCLO therapy in a healthcare setting and closely observe patients for an appropriate period of time after OMLYCLO administration. Health care providers administering OMLYCLO should be prepared to manage anaphylaxis which can be life-threatening. Inform patients of the signs and symptoms of anaphylaxis and instruct them to seek immediate medical care should symptoms occur. Selection of patients for self-administration of OMLYCLO should be based on criteria to mitigate risk from anaphylaxis [see Dosage and Administration (2.6) , Warnings and Precautions (5.1) and Adverse Reactions (6.1 , 6.2) ] . WARNING: ANAPHYLAXIS See full prescribing information for complete boxed warning. Anaphylaxis, presenting as bronchospasm, hypotension, syncope, urticaria, and/or angioedema of the throat or tongue, has been reported to occur after administration of omalizumab products. Anaphylaxis has occurred after the first dose of omalizumab products but also has occurred beyond 1 year after beginning treatment. Initiate OMLYCLO therapy in a healthcare setting, closely observe patients for an appropriate period of time after OMLYCLO administration and be prepared to manage anaphylaxis which can be life-threatening. Inform patients of the signs and symptoms of anaphylaxis and have them seek immediate medical care should symptoms occur. Selection of patients for self-administration of OMLYCLO should be based on criteria to mitigate risk from anaphylaxis. ( 2.6 , 5.1 , 6.1 , 6.2 )

Warnings

Important safety information

Anaphylaxis: Initiate OMLYCLO therapy in a healthcare setting prepared to manage anaphylaxis which can be life-threatening and observe patients for an appropriate period of time after administration. ( 5.1 ) Malignancy: Malignancies have been observed in clinical studies. ( 5.2 ) Acute Asthma Symptoms: Do not use for the treatment of acute bronchospasm or status asthmaticus. ( 5.3 ) Corticosteroid Reduction: Do not abruptly discontinue corticosteroids upon initiation of OMLYCLO therapy. ( 5.4 ) Eosinophilic Conditions: Be alert to eosinophilia, vasculitic rash, worsening pulmonary symptoms, cardiac complications, and/or neuropathy, especially upon reduction of oral corticosteroids. ( 5.5 ) Fever, Arthralgia, and Rash: Stop OMLYCLO if patients develop signs and symptoms similar to serum sickness. ( 5.6 ) Potential Medication Error Related to Emergency Treatment of Anaphylaxis: OMLYCLO should not be used for emergency treatment of allergic reactions, including anaphylaxis. ( 5.9 ) 5.1 Anaphylaxis Anaphylaxis has been reported to occur after administration of omalizumab products in premarketing clinical trials and in postmarketing spontaneous reports [see Boxed Warning and Adverse Reactions (6.2) ] . Signs and symptoms in these reported cases have included bronchospasm, hypotension, syncope, urticaria, and/or angioedema of the throat or tongue. Some of these events have been life-threatening. In premarketing clinical trials in patients with asthma, anaphylaxis was reported in 3 of 3,507 (0.1%) patients. Anaphylaxis occurred with the first dose of omalizumab in two patients and with the fourth dose in one patient. The time to onset of anaphylaxis was 90 minutes after administration in two patients and 2 hours after administration in one patient. A case-control study in asthma patients showed that, among omalizumab users, patients with a history of anaphylaxis to foods, medications, or other causes were at increased risk of anaphylaxis associated with omalizumab products, compared to those with no prior history of anaphylaxis [see Adverse Reactions (6.1) ] . In postmarketing spontaneous reports, the frequency of anaphylaxis attributed to omalizumab use was estimated to be at least 0.2% of patients based on an estimated exposure of 57,300 patients from June 2003 through December 2006. Anaphylaxis has occurred as early as after the first dose of omalizumab, but also has occurred beyond one year after beginning regularly scheduled treatment. Approximately 60% to 70% of anaphylaxis cases have been reported to occur within the first three doses of omalizumab, with additional cases occurring sporadically beyond the third dose. Initiate OMLYCLO only in a healthcare setting equipped to manage anaphylaxis, which can be life-threatening. Observe patients closely for an appropriate period of time after administration of OMLYCLO, taking into account the time to onset of anaphylaxis seen in premarketing clinical trials and postmarketing spontaneous reports [see Adverse Reactions (6.1 , 6.2) ] . Inform patients of the signs and symptoms of anaphylaxis, and instruct them to seek immediate medical care should signs or symptoms occur. Once OMLYCLO therapy has been established, administration of OMLYCLO prefilled syringe outside of a healthcare setting by a patient or a caregiver may be appropriate for selected patients. Patient selection, determined by the healthcare provider in consultation with the patient, should take into account the pattern of anaphylaxis events seen in premarketing clinical trials and postmarketing spontaneous reports, as well as individual patient risk factors (e.g., prior history of anaphylaxis), ability to recognize signs and symptoms of anaphylaxis, and ability to perform subcutaneous injections with OMLYCLO prefilled syringe with proper technique according to the prescribed dosing regimen and Instructions for Use [see Dosage and Administration (2.6) , Adverse Reactions (6.1 , 6.2) ]. Discontinue OMLYCLO in patients who experience a severe hypersensitivity reaction [see Contraindications (4) ] . 5.2 Malignancy Malignant neoplasms were observed in 20 of 4,127 (0.5%) omalizumab-treated patients compared with 5 of 2,236 (0.2%) control patients in clinical studies of adults and adolescents ≥12 years of age with asthma and other allergic disorders. The observed malignancies in omalizumab-treated patients were a variety of types, with breast, non-melanoma skin, prostate, melanoma, and parotid occurring more than once, and five other types occurring once each. The majority of patients were observed for less than 1 year. The impact of longer exposure to omalizumab products or use in patients at higher risk for malignancy (e.g., elderly, current smokers) is not known. In a subsequent observational study of 5,007 omalizumab-treated and 2,829 non-omalizumab- treated adolescent and adult patients with moderate to severe persistent asthma and a positive skin test reaction or in vitro reactivity to a perennial aeroallergen, patients were followed for up to 5 years. In this study, the incidence rates of primary malignancies (per 1,000 patient years) were similar among omalizumab-treated (12.3) and non-omalizumab-treated patients (13.0) [see Adverse Reactions (6.1) ] . However, study limitations preclude definitively ruling out a malignancy risk with omalizumab products. Study limitations include: the observational study design, the bias introduced by allowing enrollment of patients previously exposed to omalizumab (88%), enrollment of patients (56%) while a history of cancer or a premalignant condition were study exclusion criteria, and the high study discontinuation rate (44%). 5.3 Acute Asthma Symptoms and Deteriorating Disease Omalizumab products have not been shown to alleviate asthma exacerbations acutely. Do not use OMLYCLO to treat acute bronchospasm or status asthmaticus. Patients should seek medical advice if their asthma remains uncontrolled or worsens after initiation of treatment with OMLYCLO. 5.4 Corticosteroid Reduction Do not discontinue systemic or inhaled corticosteroids abruptly upon initiation of OMLYCLO therapy for asthma or CRSwNP. Decrease corticosteroids gradually under the direct supervision of a physician. In CSU patients, the use of omalizumab products in combination with corticosteroids has not been evaluated. 5.5 Eosinophilic Conditions In rare cases, patients with asthma on therapy with omalizumab products may present with serious systemic eosinophilia sometimes presenting with clinical features of vasculitis consistent with Churg-Strauss syndrome, a condition which is often treated with systemic corticosteroid therapy. These events usually, but not always, have been associated with the reduction of oral corticosteroid therapy. Physicians should be alert to eosinophilia, vasculitic rash, worsening pulmonary symptoms, cardiac complications, and/or neuropathy presenting in their patients. A causal association between omalizumab products and these underlying conditions has not been established. 5.6 Fever, Arthralgia, and Rash In post-approval use, some patients have experienced a constellation of signs and symptoms including arthritis/arthralgia, rash, fever, and lymphadenopathy with an onset 1 to 5 days after the first or subsequent injections of omalizumab products. These signs and symptoms have recurred after additional doses in some patients. Although circulating immune complexes or a skin biopsy consistent with a Type III reaction were not seen with these cases, these signs and symptoms are similar to those seen in patients with serum sickness. Physicians should stop OMLYCLO if a patient develops this constellation of signs and symptoms [see Adverse Reactions (6.2) ] . 5.7 Parasitic (Helminth) Infection Monitor patients at high risk of geohelminth infection while on OMLYCLO therapy. Insufficient data are available to determine the length of monitoring required for geohelminth infections after stopping omalizumab products…

Who should not take Omlyclo

OMLYCLO is contraindicated in patients with severe hypersensitivity reaction to omalizumab products or any ingredient of OMLYCLO [see Warnings and Precautions (5.1) ] . Severe hypersensitivity reaction to omalizumab products or any ingredient of OMLYCLO ( 4 , 5.1 )

Interactions

No formal drug interaction studies have been performed with omalizumab products. In patients with asthma, CRSwNP, and IgE-mediated food allergy the concomitant use of omalizumab products and allergen immunotherapy has not been evaluated. In patients with CSU, the use of omalizumab products in combination with immunosuppressive therapies has not been studied. No formal drug interaction studies have been performed. ( 7 )

May treat (source: NIH RxClass)

Dosage forms

Injectable

The forms currently marketed in the U.S., per the FDA National Drug Code Directory.

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Frequently asked questions

What does Omlyclo treat?
Omlyclo (Omalizumab-Igec) may be used to treat asthma, based on NIH RxClass drug-classification data (conditions a drug may treat — not a verbatim copy of the FDA-approved label). This is general reference, not medical advice.
Is there a coupon or discount for Omlyclo?
pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Omlyclo. To pay less, ask your prescriber or pharmacist whether a generic equivalent exists, check the manufacturer's copay/savings card and patient-assistance program, and compare a pharmacy discount card against your insurance copay. Prices vary by pharmacy, insurance, and location, so always confirm at the counter. This is general reference, not medical or financial advice.
Who makes Omlyclo?
Omlyclo is marketed by Celltrion Inc. You can see Celltrion Inc's full profile, rating, and other products on pharmaranks.
Is Omlyclo a brand-name or generic drug?
Omlyclo is a brand-name product with the active ingredient Omalizumab-Igec.
Is Omlyclo available over the counter?
No. Omlyclo is a prescription (Rx) medication in the US — you need a prescription from a licensed clinician (in person or via telehealth); it isn't sold over the counter. For some conditions there are OTC alternatives — ask your pharmacist.
What forms does Omlyclo come in?
Omlyclo is currently marketed as injectable, per the FDA's National Drug Code Directory.
Is Omlyclo FDA-registered?
Omlyclo is on record with the U.S. FDA under application number BLA761399. You can verify this on its official FDA label.
Is Omlyclo safe?
There's no single safe-or-not verdict, and we don't yet have a composite recall-safety score for Omlyclo. Review its FDA-label side effects and warnings below, and always consult a licensed professional.
What are the side effects of Omlyclo?
Omlyclo's side effects are taken directly from its FDA label. From the label: The following clinically significant adverse reactions are described elsewhere in the labeling: Anaphylaxis [see Boxed Warning and Warnings and Precautions (5.1) ] Malignancies [see Warnings and Precautions (5.2) ] Asthma: The most common adverse reactions (≥ 1% of patients) in clinical studies with… Both common and serious reactions are documented in full on this page. This is general reference from the FDA, not medical advice — always consult a professional.

Clinical content sourced from the FDA label via openFDA (U.S. FDA). View the FDA label on DailyMed → Provided for general reference only — not medical advice. Always consult a licensed professional and the current prescribing information.

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