Unasyn and Viagra drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Unasyn (ampicillin sodium; sulbactam sodium) and Viagra (sildenafil citrate). Common drug interactions include erythema among females and anaemia among males.

The phase IV clinical study analyzes what interactions people have when they take Unasyn and Viagra. It is created by eHealthMe based on reports of 20 people who take the same drugs from the FDA, and is updated regularly.

What is Unasyn?

Unasyn has active ingredients of ampicillin sodium; sulbactam sodium. eHealthMe is studying from 4,474 Unasyn users. Check the latest studies of Unasyn.

What is Viagra?

Viagra has active ingredients of sildenafil citrate. It is often used in erection problems. eHealthMe is studying from 63,865 Viagra users. Check the latest studies of Viagra.

On Jun, 28, 2026

20 people who take Unasyn and Viagra together, and have interactions are studied.

What are the common drug interactions of Unasyn and Viagra, by gender? *:

female:

Erythema (redness of the skin)
Flushing (the warm, red condition of human skin)
Heart rate increased
Rash
Rash neonatal (skin rash affecting healthy newborn babies)

male:

Anaemia (lack of blood)
Pain
Calculus ureteric (stone in ureter)
Costochondritis (chest wall pain)
Dental caries
Disability
Dyspepsia (indigestion)
Epicondylitis (tennis elbow)
Erythema (redness of the skin)
Gastritis erosive (a break in the surface layer of the membrane lining the stomach with infection)

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

0-1:

Erythema (redness of the skin)
Flushing (the warm, red condition of human skin)
Heart rate increased
Rash
Rash neonatal (skin rash affecting healthy newborn babies)

2-9:

n/a

10-19:

n/a

20-29:

Anhedonia (inability to experience pleasure from activities usually found enjoyable)
Anxiety
Arthritis (form of joint disorder that involves inflammation of one or more joints)
Atrial fibrillation (fibrillation of the muscles of the atria of the heart)
Back pain
Blood glucose increased
Bronchitis (inflammation of the mucous membrane in the bronchial tubes)
Cardiac disorder
Cardiac failure congestive
Coagulopathy (blood's ability to clot is impaired)

30-39:

n/a

40-49:

Deformity (disfigurement)
Necrotising fasciitis (an uncommon life-threatening soft-tissue infection)
Nerve injury
Pain
Renal failure (kidney dysfunction)
Renal tubular necrosis (death of kidney tubules)
Scar
Scrotal abscess (pus in scrotum)
Sepsis (a severe blood infection that can lead to organ failure and death)
Septic shock (shock due to blood infection)

50-59:

Hepatic encephalopathy (spectrum of neuropsychiatric abnormalities in patients with liver failure)
Hepatic failure (liver failure)
Hepatic neoplasm malignant (liver cancer)
Hyperglycaemia (high blood sugar)
Liver fatty (fat deposition of liver)
Metastases to large intestine (cancer spreads to large intestine)
Renal impairment (severely reduced kidney function)
Peritonitis (inflammation of the peritoneum, the thin tissue that lines the inner wall of the abdomen and covers most of the abdominal organs)
Anaemia (lack of blood)
Bursitis infective staphylococcal (staphylococcal infection of the subacromial/subdeltoid bursa)

60+:

Anaemia (lack of blood)
Anhedonia (inability to experience pleasure from activities usually found enjoyable)
Dyspepsia (indigestion)
Epicondylitis (tennis elbow)
Erythema (redness of the skin)
Gastritis erosive (a break in the surface layer of the membrane lining the stomach with infection)
Gastrooesophageal reflux disease (stomach contents (food or liquid) leak backwards from the stomach into the oesophagus)
Gynaecomastia (enlargement of the gland tissue of the male breast)
Hiatus hernia (hernia resulting from the protrusion of part of the stomach through the diaphragm)
Hypotension (abnormally low blood pressure)

What are the existing conditions these people have? *

Multiple Myeloma (cancer of the plasma cells): 9 people, 45.00%
Pain: 3 people, 15.00%
Hypotension (abnormally low blood pressure): 3 people, 15.00%
Type 2 Diabetes: 2 people, 10.00%
Bipolar Disorder (mood disorder): 2 people, 10.00%
Right Ventricular Failure (right half of the heart fails to work): 2 people, 10.00%
Primary Pulmonary Hypertension (primary high blood pressure that affects the arteries in the lungs and the right side of your heart): 2 people, 10.00%
Weight Decreased: 2 people, 10.00%
Fungal Infection: 2 people, 10.00%
Weight Loss: 1 person, 5.00%

* Approximation only. Some reports may have incomplete information.

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