The pharmaceutical industry giants offer reliable profit growth and above-average dividend yields.Investors looking for high-yield dividend stocks to buy now should turn their attention toward the healthcare sector: Three relatively reliable drugmakers are trading near their 52-week lows.Their stock prices may have been beaten down, but it's more than likely that better days are ahead. Here's how these stocks could produce heaps of passive income for patient investors who buy now.1. PfizerShares of Pfizer ( ...