Protect yourself against shingles with the shingles vaccine at Trio Pharmacy. Shingles, or herpes zoster, is a painful rash caused by the reactivation of the varicella-zoster virus. It can lead to severe pain, itching, and long-lasting nerve pain called postherpetic neuralgia (PHN). Even if you did not have chickenpox as a child, you should still get the shingles vaccine, as it is 97% effective at preventing the disease. The vaccine is given in two doses, 2 to 6 months apart. Schedule your shingles vaccine.