How Viagra Works and Emergency Warning Signs
How Viagra Works in Your Body
Viagra contains sildenafil, a PDE5 inhibitor that works by increasing blood flow to the penis during sexual arousal. It blocks the phosphodiesterase type 5 enzyme, allowing blood vessels to relax and widen. This medication typically takes 30-60 minutes to work and its effects can last 4-6 hours. Importantly, Viagra doesn't cause automatic erections - sexual stimulation is still required for it to be effective.
Medical Emergencies Requiring A&E Attention
Priapism is the most serious emergency associated with Viagra use. This condition involves an erection lasting more than 4 hours and requires immediate medical treatment to prevent permanent damage. If you experience chest pain, severe dizziness, or fainting during sexual activity, seek emergency care immediately as these could indicate cardiovascular complications.
When to Contact Your GP Urgently
Sudden vision changes, including partial or complete vision loss, require prompt medical assessment. Similarly, sudden hearing loss or ringing in the ears warrants immediate consultation with a healthcare professional. These rare side effects, whilst uncommon, need urgent evaluation to prevent potential permanent damage.
Avoiding Dangerous Drug Interactions
Never take Viagra if you're using nitrate medications (GTN spray, isosorbide tablets) as this combination can cause dangerously low blood pressure. Always inform healthcare providers about all medications you're taking, including over-the-counter drugs and herbal supplements. EverydayMeds' clinical assessment process helps identify potential interactions before prescribing.
Safe Usage Guidelines
Take only one dose within 24 hours and never exceed 100mg in a single dose. Avoid taking Viagra with large meals or alcohol, as these can reduce its effectiveness and increase side effect risks. Both branded Viagra and generic Sildenafil work identically - patients can choose their preferred option during checkout based on personal preference and budget considerations.
