Is hydrocodone in Fentanyl patches

It's extremely common for Duragesic patients to have Hydrocodone, Oxycodone, or other acute opiate meds (Demerol, Methadone, etc.) as their breakthrough medication. Remember that patches are for primary, chronic pain; increased activity can cause the pain to increase past the point of patch effectiveness, which is termed "breakthrough pain". In those cases, an acute (short term) pain med like Vicodin or Percocet is used to deal with the short term increase.

I myself have used Percocet 10/325's for about 10 years in conjunction with my patches, about 120/month. At some point though, if breakthrough becomes constant, then it's time to re-evaluate the need for a higher dose patch or patch combination. I've had to deal with this several times over the years, and I prefer to use pills because it gives you more spot control of the pain. But for severe increases (see my bio for more), adding another patch is really the only way to go.