It is common after a number of year for an SRNI like Effexor to cease working. When that happens there are a number of options. The doctor can try another SNRI like Prestiq, switch to an SSRI like Zoloft, or Celexa, etc, or try an add on like Abilify, etc.Do not despair there are several options and what you are experiencing is quite common and the solution is finding the correct regimen.
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An SSRI is a Selective Seratonin Uptake Inhibitor and works on the brain neuro transmitter Seratonin. A SNRI is a Selective Noroepinephrine Reuptake Inhibitor and works on the brain neuro transmitter Norepinephrine. They both work on depressin and anxiety. 160 mgs is a moderate dose and should not cause problems, although the higher you go the more likely are side effects.
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