Theo-24 and Xolair drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Theo-24 (theophylline) and Xolair (omalizumab). Common drug interactions include arthralgia among females and malaise among males.

The phase IV clinical study analyzes what interactions people have when they take Theo-24 and Xolair. It is created by eHealthMe based on reports of 32 people who take the same drugs from the FDA, and is updated regularly.

What is Theo-24?

Theo-24 has active ingredients of theophylline. It is often used in asthma. eHealthMe is studying from 436 Theo-24 users. Check the latest studies of Theo-24.

What is Xolair?

Xolair has active ingredients of omalizumab. It is often used in asthma. eHealthMe is studying from 77,554 Xolair users. Check the latest studies of Xolair.

On Jul, 08, 2026

32 people who take Theo-24 and Xolair together, and have interactions are studied.

What are the common drug interactions of Theo-24 and Xolair, by gender? *:

female:

Arthralgia (joint pain)
Sinusitis (inflammation of sinus)
Bronchitis (inflammation of the mucous membrane in the bronchial tubes)
Skin lesion
Adverse drug reaction
Adverse event
Alopecia (absence of hair from areas of the body)
Atrial fibrillation (fibrillation of the muscles of the atria of the heart)
Blood urine present
Cardiac failure congestive

male:

Malaise (a feeling of general discomfort or uneasiness)
Arthralgia (joint pain)
Eczema (patches of skin become rough and inflamed, with itching and bleeding blisters)
Gastrooesophageal reflux disease (stomach contents (food or liquid) leak backwards from the stomach into the oesophagus)
Growth retardation (delayed growth)
Hypogammaglobulinaemia (an abnormally low concentration of gamma globulin in the blood and increased risk of infection)
Localised infection (infection at the single location)
Lymphadenopathy (disease or enlargement of lymph nodes)
Metabolic acidosis (body produces too much acid, or when the kidneys are not removing enough acid from the body)
Mycoplasma infection (bacterial infection)

What are the common drug interactions of Theo-24 and Xolair, by age (0-1 to 60+)? *:

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

n/a

30-39:

n/a

40-49:

Adverse drug reaction
Adverse event
Arthralgia (joint pain)
Fall
Grip strength decreased
Headache (pain in head)
Hypokinesia (decreased bodily movement)
Influenza like illness
Infusion site extravasation (flow of (blood or lymph) from infusion site)
Insomnia (sleeplessness)

50-59:

Arthralgia (joint pain)
Pruritus (severe itching of the skin)

60+:

Arthralgia (joint pain)
Cough
Polymyalgia rheumatica (pain in many muscles)
Temporal arteritis (inflammation and damage to blood vessels that supply the head area)
Wrist fracture
Upper respiratory tract infection
Arthritis (form of joint disorder that involves inflammation of one or more joints)
Atrial fibrillation (fibrillation of the muscles of the atria of the heart)
Bronchitis (inflammation of the mucous membrane in the bronchial tubes)
Cardiac failure congestive

What are the existing conditions these people have? *

Immunodeficiency Common Variable: 5 people, 15.62%
Pain: 2 people, 6.25%
Hypersensitivity: 2 people, 6.25%
Acute Severe Asthma: 2 people, 6.25%

* Approximation only. Some reports may have incomplete information.

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