Multivitamin and Lonsurf drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Multivitamin (ascorbic acid; biotin; cyanocobalamin; dexpanthenol; ergocalciferol; folic acid; niacinamide; pyridoxine hydrochloride; riboflavin phosphate sodium; thiamine hydrochloride; vitamin a; vitamin e) and Lonsurf (tipiracil hydrochloride; trifluridine). Common drug interactions include rash erythematous among females and death among males.

The phase IV clinical study analyzes what interactions people have when they take Multivitamin and Lonsurf. It is created by eHealthMe based on reports of 57 people who take the same drugs from the FDA, and is updated regularly.

What is Multivitamin?

Multivitamin has active ingredients of ascorbic acid; biotin; cyanocobalamin; dexpanthenol; ergocalciferol; folic acid; niacinamide; pyridoxine hydrochloride; riboflavin phosphate sodium; thiamine hydrochloride; vitamin a; vitamin e. It is often used in vitamin supplementation. eHealthMe is studying from 83,597 Multivitamin users. Check the latest studies of Multivitamin.

What is Lonsurf?

Lonsurf has active ingredients of tipiracil hydrochloride; trifluridine. eHealthMe is studying from 10,077 Lonsurf users. Check the latest studies of Lonsurf.

On Jul, 20, 2026

57 people who take Multivitamin and Lonsurf together, and have interactions are studied.

Multivitamin and Lonsurf drug interactions.

What are the common drug interactions of Multivitamin and Lonsurf, by gender? *:

female:

Rash erythematous (redness of the skin)
Red blood cell count decreased
Renal disorder (kidney disease)
Renal mass (mass in kidney)
Syncope (loss of consciousness with an inability to maintain postural tone)
Thrombosis (formation of a blood clot inside a blood vessel)
Ureteric stenosis (abnormal narrowing or contraction of a duct or canal)
Urinary bladder haemorrhage (urinary bladder bleeding)
Vaginal discharge
White blood cell count decreased

male:

Death
Nausea (feeling of having an urge to vomit)
Constipation
Dehydration (dryness resulting from the removal of water)
Platelet count decreased
Abdominal pain
Amnesia (deficit in memory caused by brain damage, disease, or psychological trauma)
Adverse event
Asthenia (weakness)
Bladder disorder

What are the common drug interactions of Multivitamin and Lonsurf, 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:

Blood potassium decreased
Dehydration (dryness resulting from the removal of water)
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development)
Urinary bladder haemorrhage (urinary bladder bleeding)
Urinary tract infection
Vomiting

50-59:

Death
Decreased appetite
Dehydration (dryness resulting from the removal of water)
Diarrhoea
Fatigue (feeling of tiredness)
Febrile neutropenia (fever with reduced white blood cells)
Stomatitis (inflammation of mucous membrane of mouth)
Weight decreased
Dyspnoea (difficult or laboured respiration)
Haemoglobin decreased

60+:

Fatigue (feeling of tiredness)
Death
Red blood cell count decreased
Urinary tract infection
Disease progression
Platelet count decreased
Vomiting
Kidney infection
Neuropathy peripheral (surface nerve damage)
Abdominal discomfort

What are the existing conditions these people have? *

Colon Cancer: 39 people, 68.42%
Rectal Cancer (cancer of rectum): 8 people, 14.04%
Colorectal Cancer Metastatic (cancer of colon and rectal spreads to other parts): 5 people, 8.77%
Oesophageal Carcinoma (cancer tumour of oesophagus): 3 people, 5.26%

* Approximation only. Some reports may have incomplete information.

Do you take Multivitamin and Lonsurf?

- 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