Avonex and Pyridium drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Avonex (interferon beta 1a) and Pyridium (phenazopyridine hydrochloride). Common drug interactions include migraine among females and nephrolithiasis among males.

The phase IV clinical study analyzes what interactions people have when they take Avonex and Pyridium. It is created by eHealthMe based on reports of 25 people who take the same drugs from the FDA, and is updated regularly.

What is Avonex?

Avonex has active ingredients of interferon beta 1a. It is often used in multiple sclerosis. eHealthMe is studying from 198,544 Avonex users. Check the latest studies of Avonex.

What is Pyridium?

Pyridium has active ingredients of phenazopyridine hydrochloride. It is often used in urinary tract infection. eHealthMe is studying from 1,841 Pyridium users. Check the latest studies of Pyridium.

On Jul, 11, 2026

25 people who take Avonex and Pyridium together, and have interactions are studied.

What are the common drug interactions of Avonex and Pyridium, by gender? *:

female:

Migraine (headache)
Hyperlipidaemia (presence of excess lipids in the blood)
Mastitis (inflammation of breast)
Memory impairment
Menopausal symptoms
Muscle twitching
Musculoskeletal stiffness (stiffness of the body's muscles, joints, tendons, ligaments and nerves)
Staphylococcal infection (an infection with staphylococcus bacteria)
Stress
Balance disorder

male:

Nephrolithiasis (calculi in the kidneys)

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

n/a

30-39:

Thrombosis (formation of a blood clot inside a blood vessel)
Calculus bladder (bladder stone)
Cardiac disorder
Cataract (clouding of the lens inside the eye)
Hepatic failure (liver failure)
Hypertension (high blood pressure)
Kidney infection
Nephrolithiasis (calculi in the kidneys)
Paraplegia (paralysis of the legs and lower body)
Visual impairment

40-49:

Abdominal discomfort
Body fat disorder
Breast cancer
Cognitive disorder (mental health disorders affects learning, memory, perception, and problem solving)
Cyst (a closed sac)
Diabetes mellitus (diabetes, caused by a deficiency of the pancreatic hormone insulin)
Fatigue (feeling of tiredness)
Furuncle (infection of the hair follicle)
Hyperlipidaemia (presence of excess lipids in the blood)
Mastitis (inflammation of breast)

50-59:

Atrial fibrillation (fibrillation of the muscles of the atria of the heart)
Calculus bladder (bladder stone)
Cerebrovascular accident (sudden death of some brain cells due to lack of oxygen when the blood flow to the brain is impaired by blockage or rupture)
Coronary artery disease (plaque building up along the inner walls of the arteries of the heart, which narrows the arteries and restricts blood flow to the heart)
Escherichia urinary tract infection (urinary tract infection by escherichia coli)
Pyelonephritis (inflammation of kidney caused by bacteria)
Urinary tract infection enterococcal

60+:

Malignant melanoma (skin cancer rises from melancytes)
Squamous cell carcinoma (a cancer of a kind of epithelial cell)
Fall

What are the existing conditions these people have? *

Muscle Spasticity (tight or stiff muscles and an inability to control those muscles): 3 people, 12.00%
Constipation: 3 people, 12.00%
Relapsing-Remitting Multiple Sclerosis (reoccurrence of an inflammatory disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged): 2 people, 8.00%

* Approximation only. Some reports may have incomplete information.

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