Phoslo and Alphagan drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Phoslo (calcium acetate) and Alphagan (brimonidine tartrate). Common drug interactions include abdominal pain among females and abdominal pain among males.

The phase IV clinical study analyzes what interactions people have when they take Phoslo and Alphagan. It is created by eHealthMe based on reports of 18 people who take the same drugs from the FDA, and is updated regularly.

What is Phoslo?

Phoslo has active ingredients of calcium acetate. eHealthMe is studying from 4,291 Phoslo users. Check the latest studies of Phoslo.

What is Alphagan?

Alphagan has active ingredients of brimonidine tartrate. It is often used in glaucoma. eHealthMe is studying from 9,981 Alphagan users. Check the latest studies of Alphagan.

On Jul, 26, 2026

18 people who take Phoslo and Alphagan together, and have interactions are studied.

What are the common drug interactions of Phoslo and Alphagan, by gender? *:

female:

Abdominal pain
Abdominal pain upper
Asthenia (weakness)
Diarrhoea
Discomfort
Dizziness
Dyspepsia (indigestion)
Flushing (the warm, red condition of human skin)
Heart rate increased
Nausea (feeling of having an urge to vomit)

male:

Abdominal pain
Arteriosclerosis (thickening and hardening of arteries)
Cardiomegaly (increased size of heart than normal)
Eye inflammation
Flushing (the warm, red condition of human skin)
Haematochezia (passage of stools containing blood)
Haemorrhoids (a swollen vein or group of veins in the region of the anus)
Heart rate decreased
Hiatus hernia (hernia resulting from the protrusion of part of the stomach through the diaphragm)
Impaired gastric emptying

What are the common drug interactions of Phoslo and Alphagan, 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:

Abdominal pain
Abdominal pain upper
Asthenia (weakness)
Diarrhoea
Discomfort
Dizziness
Dyspepsia (indigestion)
Flushing (the warm, red condition of human skin)
Heart rate increased
Nausea (feeling of having an urge to vomit)

50-59:

Cellulitis (infection under the skin)
Flushing (the warm, red condition of human skin)
Herpes zoster
Peritonitis (inflammation of the peritoneum, the thin tissue that lines the inner wall of the abdomen and covers most of the abdominal organs)
Sepsis (a severe blood infection that can lead to organ failure and death)
White blood cell count decreased
Abdominal pain
Abdominal pain upper
Asthenia (weakness)
Blood glucose increased

60+:

Abdominal pain
Arteriosclerosis (thickening and hardening of arteries)
Gastrointestinal haemorrhage (bleeding gastrointestinal tract)
Haematochezia (passage of stools containing blood)
Haemorrhoids (a swollen vein or group of veins in the region of the anus)
Heart rate decreased
Hiatus hernia (hernia resulting from the protrusion of part of the stomach through the diaphragm)
Impaired gastric emptying
Lactic acidosis (low ph in body tissues)
Left ventricular hypertrophy (the thickening of the myocardium (muscle) of the left ventricle of the heart)

What are the existing conditions these people have? *

High Blood Cholesterol: 3 people, 16.67%
Headache (pain in head): 2 people, 11.11%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 2 people, 11.11%
Atrial Fibrillation/flutter (atrial fibrillation and flutter are abnormal heart rhythms in which the atria, or upper chambers of the heart, are out of sync with the ventricles): 2 people, 11.11%
Attention Deficit Hyperactivity Disorder (a chronic condition including attention difficulty, hyperactivity, and impulsiveness): 2 people, 11.11%
Chronic Renal Failure (kidney failure): 2 people, 11.11%
Cough: 2 people, 11.11%
Diabetes: 2 people, 11.11%
Fluid Retention (an abnormal accumulation of fluid in the blood): 2 people, 11.11%
Fungal Infection: 2 people, 11.11%

* Approximation only. Some reports may have incomplete information.

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