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

Summary:

Drug interactions are reported among people who take Viagra (sildenafil citrate) and Zemplar (paricalcitol). Common drug interactions include drug ineffective among females and arthralgia among males.

The phase IV clinical study analyzes what interactions people have when they take Viagra and Zemplar. It is created by eHealthMe based on reports of 51 people who take the same drugs from the FDA, and is updated regularly.

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.

What is Zemplar?

Zemplar has active ingredients of paricalcitol. It is often used in kidney disease. eHealthMe is studying from 15,494 Zemplar users. Check the latest studies of Zemplar.

On Jul, 11, 2026

51 people who take Viagra and Zemplar together, and have interactions are studied.

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

female:

Drug ineffective
Haematuria (presence of blood in urine)
Leukocyturia (presence of white blood cells in urine)
Transitional cell carcinoma (cancer tumour inner most layer of urinary system)
Urinary tract infection enterococcal

male:

Arthralgia (joint pain)
Erythema multiforme (a type of hypersensitivity reaction)
Anxiety
Mitral valve incompetence (inefficient heart valve)
Pain
Skin disorder (skin disease)
Back pain
Haemorrhage (bleeding)
Ventricular hypertrophy (enlargement of ventricles (lower chambers) in the heart)
Diarrhoea

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

n/a

30-39:

Cerebrovascular accident (sudden death of some brain cells due to lack of oxygen when the blood flow to the brain is impaired by blockage or rupture)

40-49:

Pericarditis uraemic
Pleural effusion (water on the lungs)
Rosacea (a skin condition that causes facial redness)
Sinusitis (inflammation of sinus)
Skin disorder (skin disease)
Swelling
Vascular calcification (deposits of calcium in the blood vessels)
Ventricular hypokinesia (muscle of one's heart does not contract as much as most peoples' hearts do)
Asthenia (weakness)
Back pain

50-59:

Restless legs syndrome (a powerful urge to move your legs)
Anhedonia (inability to experience pleasure from activities usually found enjoyable)
Anxiety
Arthralgia (joint pain)
Azotaemia (excess of urea or other nitrogenous compounds in the blood)
Back pain
Balance disorder
Emotional distress
Fatigue (feeling of tiredness)
Fibrosis (formation of excess fibrous connective tissue in an organ or tissue)

60+:

Cerebellar haemorrhage (bleeding in cerebeller)
Hemiplegia (paralysis of one side of the body)
Abnormal behaviour
Atrial fibrillation (fibrillation of the muscles of the atria of the heart)
Blood creatinine increased
Blood phosphorus increased
Chronic kidney disease
Diastolic dysfunction
Disorientation (disability in which the senses of time, direction, and recognition of people and places)
Dyspnoea (difficult or laboured respiration)

What are the existing conditions these people have? *

High Blood Cholesterol: 12 people, 23.53%
Pain: 10 people, 19.61%
High Blood Pressure: 9 people, 17.65%
Blood Phosphorus Increased: 6 people, 11.76%
Hyperparathyroidism Secondary (an abnormally high concentration of parathyroid hormone in the blood, resulting in weakening of the bones through loss of calcium-secondary): 6 people, 11.76%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 5 people, 9.80%
Nuclear Magnetic Resonance Imaging Abdominal: 5 people, 9.80%
Cardiac Disorder: 4 people, 7.84%
Indigestion: 4 people, 7.84%
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): 3 people, 5.88%

* Approximation only. Some reports may have incomplete information.

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