What are the side effects of Viagra?

Mar 09, 2025 Source: Cainiu Health

Dr. Bai Hongmei

Introduction

The side effects of Sildenafil Citrate Tablets include facial flushing, headache, visual disturbances, nasal congestion, and indigestion. When taking Sildenafil Citrate Tablets, follow strictly the doctor's instructions and prescription; do not increase the dosage on your own. Additionally, avoid concurrent use with contraindicated medications such as nitrates to prevent serious adverse reactions such as severe hypotension.

Generally speaking, Viagra refers to sildenafil citrate tablets. The side effects of sildenafil citrate tablets include facial flushing, headache, visual disturbances, nasal congestion, and indigestion. Detailed analysis is as follows:

1. Facial Flushing

Sildenafil citrate tablets cause vasodilation, including in the facial blood vessels, increasing blood flow and resulting in redness of the facial skin. This flushing may spread from the cheeks to the neck and usually appears shortly after taking the medication, lasting for a certain period of time.

2. Headache

The drug's vasodilatory effect may also affect cerebral blood vessels, causing them to dilate and lead to headache. The severity of headaches may vary, ranging from mild discomfort to more intense pulsating pain.

3. Visual Disturbances

Sildenafil citrate inhibits phosphodiesterase type 5 (PDE5), which is also present in the eyes. Inhibition of PDE5 may affect normal eye function, causing temporary visual changes such as blurred vision or altered color perception within a few hours after taking the medication. These effects may interfere with activities requiring clear vision, such as driving.

4. Nasal Congestion

Blood vessels in the nasal cavity may also be affected by the medication, leading to vasodilation and nasal mucosal congestion, which causes nasal obstruction. This may manifest as unilateral or bilateral nasal blockage of varying severity, causing some difficulty in breathing, especially during sleep, potentially affecting sleep quality.

5. Indigestion

The medication may affect normal gastrointestinal motility and secretion of digestive fluids, impairing digestion and gastric emptying, which may lead to gastrointestinal discomfort, nausea, vomiting, and other symptoms of indigestion. These symptoms generally appear some time after taking the medication and may last for several hours.

When taking sildenafil citrate tablets, strictly follow your doctor's advice and prescriptions. Do not adjust the dosage on your own.

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What are the efficacy, effects, and side effects of Viagra (Sildenafil)?

In general, Viagra refers to sildenafil citrate tablets. The effects and uses of sildenafil citrate tablets include assisting erection, enhancing rigidity, prolonging erection duration, treating pulmonary arterial hypertension, and improving lower urinary tract symptoms. Side effects may include headache, facial flushing, indigestion, nasal congestion, and palpitations. When taking sildenafil citrate tablets, it is essential to strictly follow the physician's instructions.

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Does Viagra have side effects?

In general, Viagra refers to sildenafil citrate tablets. Sildenafil citrate tablets may cause side effects, which commonly include facial flushing, headache, visual disturbances, nasal congestion, runny nose, and indigestion. When taking sildenafil citrate tablets, patients should follow medical advice, pay attention to their physical reactions, and seek prompt medical attention and inform their doctor if any adverse symptoms occur.