Two important FDA approved changes to the warning label of Merck Pharmaceutical’s shingles vaccine, Zostavax, have been made since the controversial drug was introduced in 2006. The first was in August 2014, when, in addition to potentially causing chickenpox, another side effect was added: shingles! That’s right. The vaccine that had been – and continues to be -- aggressively marketed to prevent seniors from contracting this excruciating condition was found to actually cause shingles in some individuals.
