Bayer Consumer Health on July 14 announced that drug-free Aleve Direct Therapy features the same technology – transcutaneous electrical nerve stimulation – that doctors, chiropractors and physical therapists have used since the mid-1970s.

The Whippany, N.J.-based division of Bayer said the product uses "3-stage waveform technology" to incorporate both clinical theories of how TENS provides pain relief, blocking the transmission of pain and stimulating endorphins, natural pain-reducing chemicals.

The product's three stages comprise 30 minutes and begin with 5 minutes of high-frequency stimulation, or "strong tingling sensation," to initiate the feeling of pain relief by suppressing the transmission of pain signals from nerves, with intensity levels adjusted on a wireless remote control.

Stage two is 20 minutes of low-frequency stimulation that "feels like a gentle tapping sensation" and generates an increased endorphin release to reduce the sensitivity to pain beyond the 30-minute session. The third stage is another five minutes of high-frequency stimulation to help maintain the feeling of pain relief.

"Repeat the treatment throughout the day as needed with 30-minute breaks between sessions," according to the brand's website, which lists online and in-store retail prices between $49.88 and $59.99 for the product.

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