Phentermine and Cefdinir drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Phentermine (phentermine hydrochloride) and Cefdinir (cefdinir). Common drug interactions include fall among females and anxiety among males.

The phase IV clinical study analyzes what interactions people have when they take Phentermine and Cefdinir. It is created by eHealthMe based on reports of 64 people who take the same drugs from the FDA, and is updated regularly.

What is Phentermine?

Phentermine has active ingredients of phentermine hydrochloride. It is often used in weight loss. eHealthMe is studying from 19,870 Phentermine users. Check the latest studies of Phentermine.

What is Cefdinir?

Cefdinir has active ingredients of cefdinir. It is often used in sinusitis. eHealthMe is studying from 9,210 Cefdinir users. Check the latest studies of Cefdinir.

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 Sep, 04, 2026

64 people who take Phentermine and Cefdinir together, and have interactions are studied.

Phentermine and Cefdinir drug interactions.

What are the common drug interactions of Phentermine and Cefdinir, by gender? *:

female:

Fall
Hair colour changes
Hair disorder
Hypersensitivity
Injury
Joint injury
Migraine (headache)
Muscle tightness
Palpitations (feelings or sensations that your heart is pounding or racing)
Paraesthesia (sensation of tingling, tickling, prickling, pricking, or burning of a person's skin with no apparent long-term physical effect)

male:

Anxiety
Chronic kidney disease
Fracture
Kyphosis (a condition of over-curvature of the thoracic vertebrae (upper back))
Mobility decreased (ability to move is reduced)
Osteopenia (a condition where bone mineral density is lower than normal)
Osteoporosis (bones weak and more likely to break)
Quality of life decreased
Rash
Renal disorder (kidney disease)

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

Coeliac disease (simple food intolerance)
Infusion related reaction
Nasopharyngitis (inflammation of the nasopharynx)
Rash erythematous (redness of the skin)

30-39:

Renal failure (kidney dysfunction)
Chronic kidney disease
Drug hypersensitivity
Gastrooesophageal reflux disease (stomach contents (food or liquid) leak backwards from the stomach into the oesophagus)
Joint effusion (presence of extra fluid in joint covering)
Joint swelling
Muscle tightness
Muscular weakness (muscle weakness)
Renal injury (kidney injury)
Tubulointerstitial nephritis (a form of nephritis affecting the interstitium of the kidneys surrounding the tubules)

40-49:

Chronic kidney disease
Dermatitis atopic (inflammatory, chronically relapsing, non-contagious and pruritic skin disorder)
Discomfort
Insomnia (sleeplessness)
Rash
Emotional distress
Pain
Erythema (redness of the skin)
Peripheral swelling
Skin exfoliation (removal of the oldest dead skin cells)

50-59:

Drug dependence
Emotional distress
Headache (pain in head)
Infusion related reaction
Malaise (a feeling of general discomfort or uneasiness)
Mood swings (an extreme or rapid change in mood)
Nausea (feeling of having an urge to vomit)
Pain in extremity
Pyrexia (fever)
Red blood cell sedimentation rate increased

60+:

Chronic kidney disease
Anxiety
Fracture
Headache (pain in head)
Kyphosis (a condition of over-curvature of the thoracic vertebrae (upper back))
Mobility decreased (ability to move is reduced)
Osteopenia (a condition where bone mineral density is lower than normal)
Osteoporosis (bones weak and more likely to break)
Quality of life decreased
Rash

What are the existing conditions these people have? *

Pain: 17 people, 26.56%
High Blood Pressure: 15 people, 23.44%
High Blood Cholesterol: 15 people, 23.44%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 14 people, 21.88%
Depression: 11 people, 17.19%
Immunodeficiency Common Variable: 11 people, 17.19%
Nausea (feeling of having an urge to vomit): 11 people, 17.19%
Multiple Allergies (allergy to multiple agents): 10 people, 15.62%
Irritable Bowel Syndrome: 10 people, 15.62%
Weight Decreased: 10 people, 15.62%

* Approximation only. Some reports may have incomplete information.

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