On September 27, 2002, the Federal Motor Carrier Safety Administration (FMCSA) published new cargo securement rules. Motor carriers operating in interstate commerce must comply with the new requirements beginning January 1, 2004. The new rules are based on the North American Cargo Securement Standard Model Regulations, reflecting the results of a multi-year research program to evaluate U.S. and Canadian cargo securement regulations; the motor carrier industry's best practices; and recommendations presented during a series of public meetings involving U.S. and Canadian industry experts, Federal, State and Provincial enforcement officials, and other interested parties. The new rules require motor carriers to change the way they use cargo securement devices to prevent articles from shifting on or within, or falling from commercial motor vehicles. The changes may require motor carriers to increase the number of tiedowns used to secure certain types of cargo. However, the rule generally does not prohibit the use of tiedowns or cargo securement devices currently in use. Therefore, motor carriers are not required to purchase new cargo securement equipment or vehicles to comply with the rule. The intent of the new requirements is to reduce the number of accidents caused by cargo shifting on or within, or falling from, commercial motor vehicles operating in interstate commerce, and to harmonize to the greatest extent practicable U.S., Canadian, and Mexican cargo securement regulations.
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FMCSA has adopted new performance requirements concerning deceleration in the forward direction, and acceleration in the rearward and lateral directions, that cargo securement systems must withstand. Deceleration is the rate at which the speed of the vehicle decreases when the brakes are applied, and acceleration is the rate at which the speed of the vehicle increases in the lateral direction or sideways (while the vehicle is turning), or in the rearward direction (when the vehicle is being driven in reverse and makes contact with a loading dock). Acceleration and deceleration values are commonly reported as a proportion of the acceleration due to gravity (g). This acceleration is about 9.8 meters/second/second (32.2 feet/second/second), which means that the velocity of an object dropped from a high elevation increases by approximately 9.8 meters/second (32.2 feet/second) each second it falls. FMCSA requires that cargo securement systems be capable of withstanding the forces associated with following three deceleration/accelerations, applied separately:
For a long time doctors dismissed forgetfulness and mental confusion as a normal part of aging. But scientists now know that memory loss as you get older is by no means inevitable. Indeed, the brain can grow new brain cells and reshape their connections throughout life.Most people are familiar with at least some of the things that can impair memory, including alcohol and drug abuse, heavy cigarette smoking, head injuries, stroke, sleep deprivation, severe stress, vitamin B12 deficiency, and illnesses such as Alzheimer's disease and depression.
1. Antianxiety drugs2. Cholesterol drugs3. Antiseizure drugs4. Antidepressant drugs5. Narcotic painkillers6. Parkinson's drugs7. Hypertension drugs8. Sleeping aids9. Incontinence drugs10. Antihistamines
Alternatives: Benzodiazepines should be prescribed only rarely in older adults, in my judgment, and then only for short periods of time. It takes older people much longer than younger people to flush these drugs out of their bodies, and the ensuing buildup puts older adults at higher risk for not just memory loss, but delirium, falls, fractures and motor vehicle accidents.
If you take one of these meds for insomnia, mild anxiety or agitation, talk with your doctor or other health care professional about treating your condition with other types of drugs or nondrug treatments. If you have insomnia, for instance, melatonin might help. Taken before bedtime in doses from 3 to 10 mg, melatonin can help to reestablish healthy sleep patterns.
A study published in the journal Pharmacotherapy in 2009 found that three out of four people using these drugs experienced adverse cognitive effects "probably or definitely related to" the drug. The researchers also found that 90 percent of the patients who stopped statin therapy reported improvements in cognition, sometimes within days. In February 2012, the Food and Drug Administration ordered drug companies to add a new warning label about possible memory problems to the prescribing information for statins.
Alternatives: If you're among the many older Americans without known coronary disease who are taking these drugs to treat your slightly elevated LDL ("bad") cholesterol and low HDL ("good") cholesterol), ask your doctor or other health care provider about instead taking a combination of sublingual (under-the-tongue) vitamin B12 (1,000 mcg daily), folic acid (800 mcg daily) and vitamin B6 (200 mg daily).
How they can cause memory loss: Anticonvulsants are believed to limit seizures by dampening the flow of signals within the central nervous system (CNS). All drugs that depress signaling in the CNS can cause memory loss.
Alternatives: Talk with your health care provider about whether nondrug therapies might work just as well or better for you than a drug. You might also want to explore lowering your dose (the side effects of antidepressants are often dose-related) or switching to a selective serotonin/norepinephrine reuptake inhibitor (SSRI/SNRI). Of the drugs in this category, I find venlafaxine (Effexor) to have the fewest adverse side effects in older patients.
Examples: Fentanyl (Duragesic), hydrocodone (Norco, Vicodin), hydromorphone (Dilaudid, Exalgo), morphine (Astramorph, Avinza) and oxycodone (OxyContin, Percocet). These drugs come in many different forms, including tablets, solutions for injection, transdermal patches and suppositories.
How they can cause memory loss: These drugs work by stemming the flow of pain signals within the central nervous system and by blunting one's emotional reaction to pain. Both these actions are mediated by chemical messengers that are also involved in many aspects of cognition. So use of these drugs can interfere with long- and short-term memory, especially when used for extended periods of time.
Alternatives: In patients under the age of 50 years, nonsteroidal anti-inflammatory drugs (NSAIDs) are the frontline therapy for pain. Unfortunately, NSAID therapy is less appropriate for older patients, who have a much higher risk of dangerous gastrointestinal bleeding. Research shows the risk goes up with the dosage and duration of treatment.
Talk with your doctor or other health care provider about whether tramadol (Ultram), a nonnarcotic painkiller, might be a good choice for you. In my practice, I often recommend supplementing each 50 mg dose with a 325 mg tablet of acetaminophen (Tylenol). While there are prescription drugs that combine tramadol and acetaminophen, these products have only 37.5 mg of tramadol, and in my practice I've found that patients generally need the larger dose.
Examples: Atenolol (Tenormin), carvedilol (Coreg), metoprolol (Lopressor, Toprol), propranolol (Inderal), sotalol (Betapace), timolol (Timoptic) and some other drugs whose chemical names end with "-olol."
Alternatives: There are alternative drug and nondrug treatments for insomnia and anxiety, so talk with your health care professional about options. Melatonin, in doses from 3 to 10 mg before bedtime, for instance, sometimes helps to reestablish healthy sleep patterns.
Examples: Darifenacin (Enablex), oxybutynin (Ditropan XL, Gelnique, Oxytrol), solifenacin (Vesicare), tolterodine (Detrol) and trospium (Sanctura). Another oxybutynin product, Oxytrol for Women, is sold over the counter.How they can cause memory loss: These drugs block the action of acetylcholine, a chemical messenger that mediates all sorts of functions in the body. In the bladder, anticholinergics prevent involuntary contractions of the muscles that control urine flow. In the brain, they inhibit activity in the memory and learning centers. The risk of memory loss is heightened when the drugs are taken for more than a short time or used with other anticholinergic drugs.
Older people are particularly vulnerable to the other adverse effects of anticholinergic drugs, including constipation (which, in turn, can cause urinary incontinence), blurred vision, dizziness, anxiety, depression and hallucinations.
Alternatives: As a first step, it's important to make sure that you have been properly diagnosed. Check with your doctor or other health professional to see if your urinary incontinence symptoms might stem from another condition (such as a bladder infection or another form of incontinence) or a medication (such as a blood pressure drug, diuretic or muscle relaxant).
Correction: An earlier version of this article mistakenly implied that mirabegron (Myrbetriq), which the FDA approved last year for the treatment of overactive bladder, is an anticholinergic drug; in fact, it is in a new class of medications called beta-3 adrenergic agonists and is not expected to cause memory loss seen with anticholinergic medications. There currently are no data describing the effect of Myrbetriq on cognition.
People on ART take a combination of HIV medicines called an HIV treatment regimen. A person's initial HIV treatment regimen generally includes three HIV medicines from at least two different HIV drug classes that must be taken exactly as prescribed. There are several options that have two or three different HIV medicines combined into a once-daily pill. Long-acting injections of HIV medicine, given every two months, are also available if your health care provider determines that you meet certain requirements. 2ff7e9595c
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