Kombucha: A symbiotic mix of yeast, bacteria and the naturalistic fallacy

Feeling thirsty?

Feeling thirsty?

If you grew up in the seventies, you may remember the same food fads as I do. There was the oat bran buzz that was replaced by the wheat germ movement, the family fondue set and the homemade yogurt maker. And for a while I remember my father making what I called “aquarium water” – a foul-looking jug sitting on the kitchen counter with a gelatinous white mass floating on top. Despite the assurances it was good for me, I declined the taste tests. They didn’t push it and I never volunteered to drink this “cure all”. I thought kombucha had gone the way of gelatin-based salads and entrees, until a friend told me she was drinking it. Not only is it still a home-brew darling, kombucha isn’t just for hippies: There’s probably some for sale at your local organic grocery. Yet after a bit of digging, kombucha culture still seems mired in the 1970′s. It’s still touted as a panacea, and it’s still one of the more questionable folk remedies out there. Continue reading

The elderly and prescription drugs: How do we minimize harms?

Elderly People crossing
Is the best medicine no medicine at all? Sometimes. My past posts have emphasized that the appropriateness of any drug depends on an evaluation of benefits and risks. There are no completely safe interventions, and no drug is free of any side effects. Our choice is ideally informed by high-quality data like randomized controlled trials, with lots of real-world experience so we understand a drug’s true toxicity. But when it comes down to a single patient, treatment decisions are personalized: we must consider individual patient characteristics to understand the expected benefits and potential harms. And in a world with perfect prescribing and drug use, harms wouldn’t be eliminated, but they would be minimized. Unfortunately, we’re not there yet. There is ample evidence to show that the way in which prescription drugs are currently used causes avoidable harms to patients. It’s an opportunity to dramatically improve care and health outcomes that continues to be largely missed by the pharmacy profession.

The art and science of medicine is a series of interventions to improve health. In making these treatment decisions, we strive to minimize iatrogenic harm — that is, harms caused by the intervention itself. High up on the list of of avoidable harms are adverse events related to drug treatments. Audits of adverse events are astonishing and shameful. Studies suggest 28% of events are avoidable in the community setting, and 42% are avoidable in long-term care settings. That’s a tremendous amount of possible harm resulting from treatments that were prescribed to help. And the group that is harmed the most? The elderly. Continue reading

Gold mine or dumpster dive? A closer look at adverse event reports

Correlation doesn't always equal causation

All informed health decisions are based on an evaluation of risks and benefits. Nothing is without risk. Drugs can provide an enormous benefit, but they all have the potential to harm. Whether it’s to guide therapy choices or to ensure patients are aware of the risks of their prescription drugs, I spend a lot of time discussing the potential negative consequences of treatments. It’s part of my dialogue with consumers: You cannot have an effect without the possibility of an adverse effect. And even when used in a science-based way, there is always the possibility of a drug causing either predictable or idiosyncratic harm.

An “adverse event” is an undesirable outcome related to the provision of healthcare. It may be a natural consequence of the underlying illness, or it could be related to a treatment provided. The use of the term “event” is deliberate, as it does not imply a cause: it is simply associated with an intervention. The term “adverse reaction,” or more specifically “adverse drug reaction,” is used where a causal relationship is strongly suspected. Not all adverse events can be be causally linked to health interventions. Consequently, many adverse events associated with drug treatments can only be considered “suspected” adverse drug reactions until more information emerges to suggest the relationship is likely to be true.

Correlation fallacies can be hard to identify, even for health professionals. You take a drug (or, say, are given a vaccine). Soon after, some event occurs. Was the event caused by the treatment? It’s one of the most common questions I receive: “Does drug ‘X’ cause reaction ‘Y’?” We know correlation doesn’t equal causation. But we can do better than dismissing the relationship as anecdotal, as it could be real. Consider an adverse event that is a believed to be related to drug therapy: Continue reading

The risks of CAM: How much do we know?

Working in pharmacies where supplements are sold alongside traditional (over-the-counter) medications, I’m regularly astonished at the different perceptions consumers can have about the relative efficacy and safety of different types of products. Once, speaking with a customer about a medical condition she wanted to treat, I indicated that there were no effective non-prescription therapies — she needed to see a physician for access to an effective treatment by prescription — and I gestured behind the counter. “Back there?!” she pointed. “That’s where you keep the stuff that kills people! I want something natural!” Suggesting that my patients with heart disease or HIV had a somewhat different perspective, I tried (unsuccessfully) to talk her out of a questionable-looking supplement (Hint: avoid anything from a company with a P.O. box as a mailing address.) This appeal to nature, combined with a perception that natural products are safe, and conventional drugs are unsafe, is pervasive. Continue reading