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

Summary:

Drug interactions are reported among people who take Omnicef (cefdinir) and Vitamin d (ergocalciferol). Common drug interactions include hypophosphataemia among females and renal failure among males.

The phase IV clinical study analyzes what interactions people have when they take Omnicef and Vitamin d. It is created by eHealthMe based on reports of 83 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 Vitamin d?

Vitamin d has active ingredients of ergocalciferol. It is often used in low vitamin d. eHealthMe is studying from 294,095 Vitamin d users. Check the latest studies of Vitamin d.

eHealthMe: drug outcomes in the real world

eHealthMe runs one of the largest post-marketing drug safety studies in the world. We study millions of patients and 5,000 more each day. Our data-driven phase IV clinical trials have been referenced on 800+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Tools to study our phase IV findings are available to the public, anonymous and free >>>.

On Aug, 22, 2026

83 people who take Omnicef and Vitamin d together, and have interactions are studied.

Omnicef and Vitamin d drug interactions.

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

female:

Hypophosphataemia (electrolyte disturbance in which there is an abnormally low level of phosphate in the blood)
Impaired self-care
Spinal compression fracture (fracture due to spinal compression on bone)
Urinary tract infection
Asthenia (weakness)
Depression
Gastric ulcer (stomach ulcer)
Back pain
Diverticulitis (digestive disease which involves the formation of pouches (diverticula) within the bowel wall)
Duodenal ulcer

male:

Renal failure (kidney dysfunction)
Malaise (a feeling of general discomfort or uneasiness)
Lung disorder (lung disease)
Pleural effusion (water on the lungs)
Decreased appetite
Pneumonia
Nephrotic syndrome (kidney disease with proteinuria, hypoalbuminemia, and oedema)
Renal tubular necrosis (death of kidney tubules)
Tubulointerstitial nephritis (a form of nephritis affecting the interstitium of the kidneys surrounding the tubules)
Acute febrile neutrophilic dermatosis (skin disease characterized by the sudden onset of fever, leukocytosis, and tender)

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

0-1:

n/a

2-9:

Hypophagia (reduced food intake)
Influenza
Respiratory distress (difficulty in breathing)
Adenovirus infection
Dehydration (dryness resulting from the removal of water)
Hepatic enzyme increased
Hypoglycaemia (deficiency of glucose in the bloodstream)
Nausea (feeling of having an urge to vomit)
Pneumonia
Pneumonia respiratory syncytial viral (respiratory syncytial virus (rsv) is a very common virus that leads to mild, cold-like symptoms in adults and older healthy children)

10-19:

Headache (pain in head)
Choking (mechanical obstruction of the flow of air from the environment into the lungs)
Decreased appetite
Dysphemia (stammering or stuttering)
Fall
Malaise (a feeling of general discomfort or uneasiness)
Nausea (feeling of having an urge to vomit)
Pain in extremity
Photophobia (extreme sensitivity to light)
Disease progression

20-29:

Adverse drug reaction
Back pain
Chronic kidney disease
Confusional state
Dizziness
Emotional distress
Fatigue (feeling of tiredness)
Fear
Hallucination (an experience involving the perception of something not present)
Hypoaesthesia (reduced sense of touch or sensation)

30-39:

Chronic kidney disease
Nephrogenic anaemia (anaemia due to kidney disease)
Renal failure (kidney dysfunction)

40-49:

Chronic kidney disease
Nephrotic syndrome (kidney disease with proteinuria, hypoalbuminemia, and oedema)
Renal failure (kidney dysfunction)
Renal tubular necrosis (death of kidney tubules)
Tubulointerstitial nephritis (a form of nephritis affecting the interstitium of the kidneys surrounding the tubules)
Fatigue (feeling of tiredness)
Lymphocyte count decreased
Neutrophil count decreased (less than normal number of neutrophil a type of blood cell)
Urine abnormality
Acne (skin problems that cause pimples)

50-59:

Anaemia (lack of blood)
Fear of disease
Mania (a state of abnormally elevated or irritable mood)
Panic disorder
Back pain
Dizziness
Headache (pain in head)
Hepatic steatosis (fatty liver disease)
Nausea (feeling of having an urge to vomit)
Abdominal distension

60+:

Nausea (feeling of having an urge to vomit)
Anxiety
Asthenia (weakness)
Chronic kidney disease
Dysphagia (a condition in which swallowing is difficult or painful)
Fatigue (feeling of tiredness)
Seizure (abnormal excessive or synchronous neuronal activity in the brain)
Urosepsis (secondary infection that occurs when a urinary tract infection spreads to the bloodstream)
Aphasia (damage to the parts of the brain that control language)
Device occlusion

What are the existing conditions these people have? *

Pain: 32 people, 38.55%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 22 people, 26.51%
High Blood Pressure: 14 people, 16.87%
Nausea (feeling of having an urge to vomit): 14 people, 16.87%
High Blood Cholesterol: 12 people, 14.46%
Rickets (softening of bones): 10 people, 12.05%
Cough: 10 people, 12.05%
Neuralgia (pain in one or more nerves): 10 people, 12.05%
Fibromyalgia (a long-term condition which causes pain all over the body): 9 people, 10.84%
Urinary Tract Infection: 8 people, 9.64%

* Approximation only. Some reports may have incomplete information.

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