Off-label use

Off-label use is the use of pharmaceutical drugs for an unapproved indication or in an unapproved age group, dosage, or route of administration. Both prescription drugs and over-the-counter drugs (OTCs) can be used in off-label ways, although most studies of off-label use focus on prescription drugs. Off-label use is the use of pharmaceutical drugs for an unapproved indication or in an unapproved age group, dosage, or route of administration. Both prescription drugs and over-the-counter drugs (OTCs) can be used in off-label ways, although most studies of off-label use focus on prescription drugs. Off-label use is generally legal unless it violates ethical guidelines or safety regulations. The ability to prescribe drugs for uses beyond the officially approved indications is commonly used to good effect by healthcare providers. For example, methotrexate is commonly used off-label because its immunomodulatory effects relieve various disorders. However, off-label use can entail health risks and differences in legal liability. Marketing of pharmaceuticals for off-label use is usually prohibited. An indication is when a drug is medically appropriate for a given condition; an approved indication is when a government drug regulatory agency formally agrees that the drug is medically appropriate for the named condition. Indications may depend not only upon the medical condition that is being treated, but also upon other factors, such as dose, the patient's age, size and sex, whether the patient is pregnant or breastfeeding, and other medical conditions. For example, aspirin is generally indicated for a headache, but it is not indicated for headaches in people with an allergic reaction to it. When the drug's manufacturer has received a marketing approval from the government agency, then it is allowed to promote the drug for the specific, agreed-upon approved indications in that country. All legally approved indications are listed on the drug package insert or 'label'. Drug manufacturers are not legally permitted to encourage the use of regulated drugs for any indications that have not been formally approved by the country's government, even if significant scientific evidence exists for that unapproved indication, or even if another country's drug agency has approved that indication. However, healthcare providers are not required to limit prescriptions or recommendations to the indications approved by their country's drug regulatory agency, and in fact the standard of care for many conditions involves off-label uses, either as first-line therapy or as a subsequent line. In other words, properly understanding why off-label use is common and usually appropriate, rather than rare and usually inappropriate, requires understanding that the distinction between regulatory-agency-approved use versus off-label use is not the same distinction as safe versus unsafe, tested versus untested, or good versus bad; it is a marker of increased certainty about a use being good (safe and effective), as opposed to less certainty—rather than a marker of good as opposed to bad. Regulatory approval for an indication requires a body of evidence that costs money to assemble, and as with evidence-based medicine generally, the desire for a vast, high-quality evidence base is an ideal that real-world practice can only aspire to and further approach, rather than completely match; there may not be enough resources to test every drug for every possible or logical indication to an exhaustive degree. Regulation of therapy freedom thus takes an approach in which anything not explicitly forbidden is allowed rather than an approach in which anything not explicitly allowed is forbidden, and it is accepted that drugs may be used in off-label ways as long as a competent professional prescribes them. Off-label use is very common. Generic drugs generally have no sponsor as their indications and use expands, and incentives are limited to initiate new clinical trials to generate additional data for approval agencies to expand indications of proprietary drugs. Up to one-fifth of all drugs are prescribed off-label and amongst psychiatric drugs, off-label use rises to 31%. Among use of antipsychotic medications in the United States, a shift occurred from typical agents in 1995 (84% of all antipsychotic visits) to atypical agents by 2008 (93%). Atypical use has grown far beyond substitution for the now infrequently used typical agents. A 2009 study found that 62% of U.S. pediatric office visits from 2001-2004 included off-label prescribing, with younger children having a higher chance of receiving off-label prescriptions. Specialist physicians also prescribed off-label more frequently than general pediatricians. In 2003, passage of the Pediatric Research Equity Act gave the FDA power to require pharmaceutical companies to perform clinical trials in all age groups in which clinical use is reasonably foreseeable. By some estimates, the number of clinical trials performed in children from 2002 - 2012 exceeded that in the prior 50 years. In 2014, the American Academy of Pediatrics released a statement regarding off-label use of pharmaceuticals in children. The article recommends to pediatricians that 'Off-label use is neither incorrect nor investigational if based on sound scientific evidence, expert medical judgment, or published literature' and that 'Evidence, not label indication, remains the gold standard from which practitioners should draw when making therapeutic decisions for their patients.' The statement further advocates additional support and additional incentives for clinical testing of drugs in children, and publication of all results irrespective of positive outcome.