Allegra and Methyldopa drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Allegra (fexofenadine hydrochloride) and Methyldopa (methyldopa). Common drug interactions include insomnia among females and acne among males.

The phase IV clinical study analyzes what interactions people have when they take Allegra and Methyldopa. It is created by eHealthMe based on reports of 27 people who take the same drugs from the FDA, and is updated regularly.

What is Allegra?

Allegra has active ingredients of fexofenadine hydrochloride. It is often used in allergies. eHealthMe is studying from 75,498 Allegra users. Check the latest studies of Allegra.

What is Methyldopa?

Methyldopa has active ingredients of methyldopa. It is often used in high blood pressure. eHealthMe is studying from 6,475 Methyldopa users. Check the latest studies of Methyldopa.

On Aug, 01, 2026

27 people who take Allegra and Methyldopa together, and have interactions are studied.

Allegra and Methyldopa drug interactions.

What are the common drug interactions of Allegra and Methyldopa, by gender? *:

female:

Insomnia (sleeplessness)
Pain in extremity
Amnesia (deficit in memory caused by brain damage, disease, or psychological trauma)
Bronchitis (inflammation of the mucous membrane in the bronchial tubes)
Chest pain
Cluster headache (one-sided head pain with tearing)
Diarrhoea
Drug ineffective
Nausea (feeling of having an urge to vomit)
Weight decreased

male:

Acne (skin problems that cause pimples)
Arthralgia (joint pain)
Anxiety
Asthma
Cough
Disturbance in attention
Dysphemia (stammering or stuttering)
Dyspnoea (difficult or laboured respiration)
Emotional disorder
Extrapyramidal disorder (involuntary muscle spasms in the face and neck)

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

n/a

30-39:

n/a

40-49:

Cachexia (loss of weight)
Cancer pain
Delivery
Maternal exposure during pregnancy (use of substance during pregnancy)
Metastases to liver (cancer spreads to liver)
Metastases to lymph nodes (cancer spreads to lymph node)
Pancreatic carcinoma metastatic (pancreatic cancer- metastatic)
Peritonitis (inflammation of the peritoneum, the thin tissue that lines the inner wall of the abdomen and covers most of the abdominal organs)

50-59:

Amnesia (deficit in memory caused by brain damage, disease, or psychological trauma)
Bronchitis (inflammation of the mucous membrane in the bronchial tubes)
Chest pain
Cluster headache (one-sided head pain with tearing)
Diarrhoea
Drug ineffective
Insomnia (sleeplessness)
Nausea (feeling of having an urge to vomit)
Pain in extremity
Weight decreased

60+:

Fall
Femur fracture
Adverse event
Arthralgia (joint pain)
Bone disorder
Fracture displacement
Oral pruritus (itching in mouth)
Pain in extremity
Pruritus (severe itching of the skin)
Throat tightness

What are the existing conditions these people have? *

Stress And Anxiety: 8 people, 29.63%
High Blood Cholesterol: 7 people, 25.93%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 7 people, 25.93%
Indigestion: 6 people, 22.22%
Nausea (feeling of having an urge to vomit): 6 people, 22.22%
Cough: 6 people, 22.22%
Migraine (headache): 5 people, 18.52%
Nervousness: 5 people, 18.52%
Irritable Bowel Syndrome: 5 people, 18.52%
Depression: 5 people, 18.52%

* Approximation only. Some reports may have incomplete information.

Do you take Allegra and Methyldopa?

- Personalize this study to your gender, age, symptoms and drugs
- Predict drug outcomes for up to one year with AI
- Get an AI agent to monitor your drugs continuously