Whether you’re a senior in high school or a senior-living resident, you’ve likely heard of Viagra (sildenafil) — the original ...

General side effects: tiredness, headache, muscle pain, chills, joint pain, fever, nausea, feeling unwell, swollen lymph ...

Pfizer was founded in 1849 by two recent German ... But despite the cultural ubiquity, Viagra has recently faced the inevitable threat from competition and generics, dropping from 92% of the ...