Catholics should be wary of the acceptance of eastern, non-Christian religious concepts. EFT appears to have similarities with acupuncture, so I did some looking for acupuncture since EFT is lesser-known. I came across the following:
The Western form of acupuncture, which is based on science and not
Taoism, is acceptable for use by Christians. However, the traditional
Chinese acupuncture belief system is not compatible with Christianity.
"The philosophical thinking behind acupuncture comes from Taoism and
the concept of the yin and yang, and of being at one with the forces
in the universe through meditation," the Irish Theological Commission
wrote in 1994 in its document, "A Catholic Response to the New Age
Phenomenon." (See article)
So the test for whether this practice conflicts with Catholicism is whether it incorporates foreign teachings that conflict with core beliefs within the faith.
If something helps with pain or addiction and has been stripped of the dangerous dogmas of another faith, it may be harmless. This seems to rely somewhat on a placebo effect. Placebo effects can actually be very powerful at overcoming pain, apprehension, and addiction (see further reading)
A word of warning: recognize that these activities have the potential to soften your objectivity when encountering elements from eastern religions like Taoism. It has the potential to inadvertently open you up to oppositional ideas and concepts that could lead you into dangerous territory.