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not what one might hope for

Posted May 01 2014 6:23am

Probuphine-3-25-13 Somehow, I missed the buprenorphine implant until a comment on yesterday’s post.

Yesterday’s post pointed to dropout issues with buprenorphine. Of course, an implant would address that issue. However, the outcomes for the implants are, “not what one might hope for”.

Probuphine was evaluated in two placebo-controlled trials. In terms of efficacy, researchers found that patients on the active implant were more likely than those given a placebo implant to have opioid-negative urine samples on more occasions, and were less likely to need sublingual buprenorphine for treating of symptoms of withdrawal or craving.

But the response “was not what one might hope for, given that the product ensures compliance with medication for 6 months,” the researchers wrote. “It prompts speculation that the dose is simply not high enough.”

For instance, only 32% and 27% of patients in the respective trials had opioid-negative samples for half of all their urine tests, and 40% to 62% needed supplemental buprenorphine.

Of course, their theory is that the dose is too low.

The drug was rejected by the FDA. Here is one advocate’s case for the drug:

“If these patients could just start each day without having to decide whether or not to take a pill, I firmly believe we could help a greater number of patients achieve long-term sobriety.”

I see his point, but these outcomes make me wonder if this cuts both ways. What if their outcomes suffered because patient’s role is passive and they don’t make that decision on a daily basis?


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