Omnicef and Atarax drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Omnicef (cefdinir) and Atarax (hydroxyzine hydrochloride). Common drug interactions include anaphylactic reaction among females and dizziness among males.

The phase IV clinical study analyzes what interactions people have when they take Omnicef and Atarax. It is created by eHealthMe based on reports of 23 people who take the same drugs from the FDA, and is updated regularly.

What is Omnicef?

Omnicef has active ingredients of cefdinir. It is often used in sinusitis. eHealthMe is studying from 2,774 Omnicef users. Check the latest studies of Omnicef.

What is Atarax?

Atarax has active ingredients of hydroxyzine hydrochloride. It is often used in stress and anxiety. eHealthMe is studying from 23,553 Atarax users. Check the latest studies of Atarax.

On Jul, 18, 2026

23 people who take Omnicef and Atarax together, and have interactions are studied.

What are the common drug interactions of Omnicef and Atarax, by gender? *:

female:

Anaphylactic reaction (serious allergic reaction)
Arthralgia (joint pain)
Back pain
Convulsion (muscles contract and relax rapidly and repeatedly, resulting in an uncontrolled shaking of the body)
Device expulsion
Gallbladder cholesterolosis (accumulation and deposition of cholesterol inside of the)
Hiatus hernia (hernia resulting from the protrusion of part of the stomach through the diaphragm)
Idiopathic urticaria (allergic reactions, presence of hives with unknown cause)
Nerve compression
Ovarian cyst (fluid filled sac of the ovary)

male:

Dizziness
Headache (pain in head)
Petechiae (a small red or purple spot caused by bleeding into the skin)
Abdominal discomfort
Abnormal behaviour
Abscess limb (limb infection)
Actinomyces test positive
Anaphylactic reaction (serious allergic reaction)
Arteriosclerosis (thickening and hardening of arteries)
Arthralgia (joint pain)

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

0-1:

n/a

2-9:

n/a

10-19:

Headache (pain in head)
Nausea (feeling of having an urge to vomit)
Petechiae (a small red or purple spot caused by bleeding into the skin)
Abnormal behaviour
Abortion spontaneous (naturally occurring miscarriage)
Convulsion (muscles contract and relax rapidly and repeatedly, resulting in an uncontrolled shaking of the body)
Gallbladder cholesterolosis (accumulation and deposition of cholesterol inside of the)
Ovarian cyst (fluid filled sac of the ovary)
Seizure (abnormal excessive or synchronous neuronal activity in the brain)
Cholecystitis acute (rapid infection of gallbladder)

20-29:

Back pain
Device expulsion
Psoriasis (immune-mediated disease that affects the skin)

30-39:

n/a

40-49:

Blood pressure increased
Dizziness
Heart rate increased
Respiratory tract congestion (blockage on respiratory system)
Respiratory tract infection
Personality disorder
Schizoaffective disorder (a mental disorder characterized by disordered thought)
Type 2 diabetes mellitus

50-59:

Anaphylactic reaction (serious allergic reaction)
Arthralgia (joint pain)
Abdominal discomfort
Abscess limb (limb infection)
Actinomyces test positive
Arteriosclerosis (thickening and hardening of arteries)
Ataxia (loss of full control of bodily movements)
Atelectasis (partial or complete collapse of the lung)
Back pain
Balanitis candida (inflammation of the glands penis by infection with candida albicans)

60+:

Fatigue (feeling of tiredness)
Headache (pain in head)
Renal injury (kidney injury)
Pain in extremity
Pneumonia
Vertigo
Cough
Migraine (headache)
Abdominal discomfort
Chronic kidney disease

What are the existing conditions these people have? *

Asthma: 11 people, 47.83%
Dizziness: 9 people, 39.13%
Constipation: 8 people, 34.78%
Wheezing (a high-pitched whistling sound made while you breath): 7 people, 30.43%
Migraine (headache): 7 people, 30.43%
Back Pain: 7 people, 30.43%
Dyspnea (difficult or laboured breathing): 7 people, 30.43%
Fibromyalgia (a long-term condition which causes pain all over the body): 7 people, 30.43%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 7 people, 30.43%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 7 people, 30.43%

* Approximation only. Some reports may have incomplete information.

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