Flexeril and Selenium drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Flexeril (cyclobenzaprine hydrochloride) and Selenium (selenium). Common drug interactions include abdominal pain among females and neck pain among males.

The phase IV clinical study analyzes what interactions people have when they take Flexeril and Selenium. It is created by eHealthMe based on reports of 80 people who take the same drugs from the FDA, and is updated regularly.

What is Flexeril?

Flexeril has active ingredients of cyclobenzaprine hydrochloride. It is often used in muscle spasms. eHealthMe is studying from 38,308 Flexeril users. Check the latest studies of Flexeril.

What is Selenium?

Selenium has active ingredients of selenium. It is often used in vitamin supplementation. eHealthMe is studying from 5,314 Selenium users. Check the latest studies of Selenium.

On Jul, 17, 2026

80 people who take Flexeril and Selenium together, and have interactions are studied.

Flexeril and Selenium drug interactions.

What are the common drug interactions of Flexeril and Selenium, by gender? *:

female:

Abdominal pain
Arthralgia (joint pain)
Arthritis (form of joint disorder that involves inflammation of one or more joints)
Asthma
Blood cholesterol increased
Cardiac failure
Cellulitis (infection under the skin)
Chest pain
Constipation
Disorientation (disability in which the senses of time, direction, and recognition of people and places)

male:

Neck pain
Blood pressure increased
Exostosis (formation of new bone on the surface of a bone)
Flatulence (flatus expelled through the anus)
Insomnia (sleeplessness)
Nausea (feeling of having an urge to vomit)
Neuralgia (pain in one or more nerves)
Stress
Therapeutic response unexpected
Vitamin d decreased

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

n/a

30-39:

Blood pressure increased
Dizziness
Dry eye (lack of adequate tears)
Eye irritation
Eye pain
Fatigue (feeling of tiredness)
Fear
Lethargy (tiredness)
Loss of consciousness
Nasopharyngitis (inflammation of the nasopharynx)

40-49:

Intervertebral disc protrusion (spinal disc protrusion)
Aphthous ulcer (mouth ulcer)
Constipation
Exostosis (formation of new bone on the surface of a bone)
Flatulence (flatus expelled through the anus)
Insomnia (sleeplessness)
Nausea (feeling of having an urge to vomit)
Neck pain
Neuralgia (pain in one or more nerves)
Stress

50-59:

Arthralgia (joint pain)
Depression
Myalgia (muscle pain)
Nausea (feeling of having an urge to vomit)
Acute sinusitis
Alopecia (absence of hair from areas of the body)
Anaemia (lack of blood)
Arthritis (form of joint disorder that involves inflammation of one or more joints)
Arthropathy
Asthma

60+:

Nausea (feeling of having an urge to vomit)
Headache (pain in head)
Hyperhidrosis (abnormally increased sweating)
Renal failure (kidney dysfunction)
Cardiac failure
Gastrooesophageal reflux disease (stomach contents (food or liquid) leak backwards from the stomach into the oesophagus)
Haemoglobin decreased
Activities of daily living impaired
Agitation (state of anxiety or nervous excitement)
Alanine aminotransferase increased

What are the existing conditions these people have? *

Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 42 people, 52.50%
Pain: 20 people, 25.00%
High Blood Pressure: 11 people, 13.75%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 10 people, 12.50%
Nausea (feeling of having an urge to vomit): 7 people, 8.75%
Multiple Myeloma (cancer of the plasma cells): 6 people, 7.50%
Osteoporosis (bones weak and more likely to break): 5 people, 6.25%
Inflammation: 5 people, 6.25%
Constipation: 5 people, 6.25%
Sinusitis (inflammation of sinus): 4 people, 5.00%

* Approximation only. Some reports may have incomplete information.

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