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Medications can be lifesaving by performing critical tasks such as keeping blood sugar at safe levels, hearts thumping rhythmically, and moods afloat. Yet side effects and interactions between drugs (both prescription and nonprescription drugs) may increase your fall risk in numerous ways. Prime examples include blurred vision, dizziness or lightheadedness stemming from low blood pressure, drowsiness, delirium, and impaired alertness or judgment. Some medications may affect the inner ear, spurring temporary or permanent balance disorders.

Often, problems stem from the sheer number of medicines you take, rather than a single drug. According to a national health survey, a third of 45- to 64-year-olds and two-thirds of people 65 and older take three or more prescription drugs over the course of a month. And 16% of 45- to 64-year-olds, as well as 39% of people 65 and over, take five or more drugs. Some gerontologists say they rarely see patients who take fewer than six or seven. Taking many medications at the same time can boost the severity and frequency of side effects among people of any age. Older adults are especially vulnerable, because people's bodies absorb and respond to drugs differently with age.

Pay attention to healthy ingredients, inspection documents, andÌýonline reviews.

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Food trucks � once the catering staples of construction sites � are no longer just about convenience. These rolling kitchens bring innovative gourmet food to busy streets and crowded parking lots, with diverse menus that attract hordes of hungry customers and discerning foodies.

But as popular as food trucks are � nationally, a billion-dollar industry that defines the landscape in places like Los Angeles; Miami; Austin, Tex.; and Portland, Ore. � they still serve restaurant fare, which is typically loaded with saturated fat, salt, refined carbo-hydrates, sugar, and calories.

The weights add more oomph to your workout, but you'll have to mind some safety rules if you use them.

ÌýExercises photos by Michael Carroll

Move over, dumbbells; kettlebells are cool again. The little weights with handles have been used by athletes around the world for centuries and gained popularity as the staples of 19th-century strongmen. Today, kettlebells have made it to the mainstream as the featured tools in exercise classes and gyms, with home versions of kettlebells available on the shelves of every big-box store.

What's the attraction? "Kettlebells work multiple muscle groups at one time, so you get a lot of bang for your buck with each exercise," says Nancy Capparelli, a senior physical therapist at Harvard-affiliated Beth Israel Deaconess Medical Center.

News briefs

Three newly approved medications are garnering national attention. The first is an oral form of a powerful opioid painkiller that's been available by injection since 1984. Dsuvia is the sublingual (under the tongue) version of sufentanil, and it was approved by the FDA in November 2018. Dsuvia is 1,000 times more potent than morphine. The FDA says it may be helpful for use on the battlefield or in hospitals. Critics worry the drug will wind up on the streets, furthering the country's opioid crisis. Another medication of note is the first prescription drug made from marijuana. The FDA approved cannabidiol (Epidiolex) in June 2018 for the treatment of seizures associated with rare forms of epilepsy. The medication is made from a component of marijuana that does not cause intoxication or euphoria. And finally, baloxavir marboxil (Xofluza), the first new antiviral in 20 years to help fight the flu, received FDA clearance in October 2018. The drug is a one-dose pill that may help shorten the duration of the flu if it's taken within 48 hours of the start of symptoms. One caution: the new antiviral has not yet been tested in older adults, so talk to your doctor if the drug is prescribed and you have concerns.

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People with fluctuating numbers � like blood pressure, cholesterol, and weight � may be at higher risk of heart attack, stroke, and even death.

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Most people battle "yo-yoing" at some point, when their weight, blood pressure, or some other health number keeps going up and down.

On the surface, this may not seem like a problem if you routinely hit the healthy numbers. Yet new research suggests that fluctuations like this may pose a greater health risk than staying at a single level, even if it's not a perfect one.

People often become more sensitive to noise as they age, which can affect their mental and physical health.

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Are you more sensitive to noises than you used to be? Do certain sounds now feel too loud and jarring? Don't worry; it's actually quite normal.

Age-related hearing loss is common among older adults and affects about two-thirds of men in their 70s and 85% of men ages 80 and older. Although it's not clear why, this can also make people hypersensitive to sounds that they used to tolerate easily, which in turn can affect their well-being.

Here is why squats may be the most important exercise you do.

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More than half of an average person's day is spent sitting � from watching television to working at a computer � and that time tends to increase as you age and become less active.

All that sitting can have a profound impact on one's health, too. In fact, a study in the Oct. 3, 2017, Annals of Internal Medicine, involving almost 8,000 adults ages 45 and older, found a direct relationship between time spent sitting and a higher risk of early death.

In the journals

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For the first time in 10 years, the U.S. government has updated its guidelines for regular physical activity. The guidelines, published in the Nov. 20, 2018, issue of JAMA, still suggest adults get at least 150 to 300 minutes each week of moderate-intensity physical activity, and the more you can do, the better. Examples of moderate-intensity activities include brisk walking, swimming and cycling.

What is new are specific suggestions for certain age groups. For adults ages 65 and older, the report recommends their allotted minutes include multicomponent activities that offer balance training, aerobic exercise, and muscle strengthening, all of which can help older adults reduce their risk of falls. They noted that many recreational activities like dancing, yoga, tai chi, gardening, or sports often incorporate the multiple types of activity you need.

In the journals

Vitamin D and omega-3 fatty acid supplements have had mixed results when it comes to preventing heart attacks, strokes, and cancer in people who have already developed these problems or are at high risk for them. Yet a new study published online Nov. 10, 2018, by The New England Journal of Medicine found they may actually prevent these conditions among people who have never had these problems before.

Researchers recruited almost 26,000 people, ages 50 and older, who had no history of heart disease or cancer. The participants were divided into four groups. People in one group were given daily doses of 2,000 international units of vitamin D (an amount found to be linked to lower disease risk in observational studies) and 1 gram of a drug called Lovaza, which contained 840 milligrams of omega-3s (two to four times the amount in two servings of fish per week). The second group took vitamin D and a placebo, the third group took the omega-3s and a placebo, and the final group took two placebos. After more than five years, the researchers found that those given omega-3s were 28% less likely to suffer a heart attack compared with those given a placebo. Those who ate fewer servings of fish (less than the average of 1.5 servings per week) appeared to have a greater benefit from the additional omega-3s while those with higher fish intake had minimal benefit.