It's been half a year since Novartis voluntarily recalled certain packages of Excedrin, NoDoz, Bufferin and Gas-X Prevention over stray or chipped pills, but the popular medicines are not yet back on store shelves.

Novartis, the manufacturer of the medicines, explained the status of the medicines in a statement:

We are working hard to return products to store shelves as soon as possible. Novartis Consumer Health will restart production on a line-by-line, product-by-product basis to ensure control and adherence to our high standard of quality and expects to begin shipments of a limited portfolio of products in the second half of the year. We are currently in the very early stages of validating our manufacturing processes.

In January of this year, the Food and Drug Administration announced that the recall affects Excedrin and NoDoz medicines with expiration dates of Dec. 20, 2014 or earlier and Bufferin and Gas-X Prevention medicines with expiration dates of Dec. 20, 2013 or earlier.

Novartis said that there were no reported adverse health events linked with the recalled medicines; it was a precautionary recall.

The company also said that people who may possess the recalled medicines should call the Novartis Consumer Relationship Center at 1-888-477-2403 or email, to learn how to return the product and be refunded for it.

The FDA explains why the recalled medicines have the potential to be dangerous:

Mixing of different products in the same bottle could result in consumers taking the incorrect product and receiving a higher or lower strength than intended or receiving an unintended ingredient. This could potentially result in overdose, interaction with other medications a consumer may be taking, or an allergic reaction if the consumer is allergic to the unintended ingredient.

ABC News reported that some people who relied on Excedrin for migraine relief are turning to online auctions to purchase whatever Excedrin there is left. One woman even spent $500 on Excedrin on eBay when she learned about the recall, ABC News reported.

However, doctors warn about the safety of medicine from eBay, since there's no control over tampering, ABC News reported.

So why the mad scramble for the over-the-counter drug?

"When someone finds something that works, and then they're not able to get it, it can be a real problem," Dr. Andrea Synowiec, a neurologist at Allegheny General Hospital, told CBS Pittsburgh.

For more information on possible treatment options for migraines, click on over to the Mayo Clinic. And for some natural ways to ease migraine pain, click through the slideshow:

Loading Slideshow...
  • Feverfew

    One of the oldest herbal remedies for migraines, this plant can be used in many forms, included steeped in tea or even eaten raw, according to Alexander Mauskop, M.D., a board-certified neurologist focused on headaches and the director and founder of the <a href="" target="_hplink">New York Headache Center</a>. That's because it contains a powerful chemical called <a href="" target="_hplink">parthenolide</a>, which has been linked to warding off migraines, although Mauskop says science hasn't really offered an answer yet as to how or why, One of the first studies of the herb came out of Great Britain in the 1980s, and found that 70 percent of people who chewed a couple of feverfew leaves each day saw <a href="" target="_hplink">their symptoms improve and experienced fewer migraines</a>, according to the University of Maryland Medical Center. In supplement form -- as long as it contains at least 0.2 percent parthenolides -- 100 to 150 milligrams a day may do the trick, according to a HuffPost blog by Dr. Andrew Weil, because it can help "<a href="" target="_hplink">prevent the release of substances that dilate blood vessels in the head</a>."

  • Butterbur

    Unlike feverfew, this herb is toxic in any form but the processed supplement, says Mauskop. However, its headache-preventing properties are equally impressive. The chemicals in butterbur are thought to <a href="" target="_hplink">relieve spasms and decrease inflammation</a>, which can cause headaches, according to WebMD. A small 2004 study found that patients who took 75 milligrams of butterbur twice daily had <a href="" target="_hplink">48 percent fewer migraines</a>, compared to a 26 percent decrease experienced by people given only a placebo. While it's been predominantly researched as a preventive measure, there's some preliminary evidence that it can also help beat a migraine as it's happening. Taking <a href="" target="_hplink">100 milligrams every three hours</a> (up to 300 milligrams in 24 hours) just might do the trick, according to <em>Psychology Today</em>.

  • Magnesium

    Mauskop's own research found that people with migraines and cluster headaches are often deficient in magnesium. He demonstrated that an infusion of the mineral helped to stop the pain. Of course, an infusion isn't the most practical of treatments when you're struck by a migraine at the office, say, but supplements can also help. One small study found daily magnesium supplements <a href="" target="_hplink">reduced migraine frequency by nearly 42 percent</a>, compared to only about 16 percent in people given a placebo pill. Some people have trouble absorbing magnesium, says Mauskop, which can lead to the unpleasant side effect of diarrhea, but overall it's considered safe in 200 milligram daily doses, he says. <em>Flickr photo by <a href="" target="_hplink">fdecomite</a></em>

  • Riboflavin

    This B vitamin -- <a href="" target="_hplink">found naturally in foods like milk, meat, nuts and green veggies</a> -- was <a href="" target="_hplink">linked to migraine prevention</a> in a small 1998 study, but in a very high dose, writes Weil, one that would <a href="" target="_hplink">need to be prescribed by a doctor</a>. Riboflavin (and an <a href="" target="_hplink">enzyme that acts similarly called CoQ10</a>) is involved in producing energy inside the cells of the body, Mauskop explains, so it's better to take in the morning to ward off migraines, in case it disrupts sleep.

  • Omega 3s

    A dose of these healthy fats can fight inflammation, which is a likely culprit in many headaches and possibly some migraines. Everyday Health recommends <a href="" target="_hplink">flax seeds</a> but fish, like salmon, and <a href="" target="_hplink">fish oil supplements may also help</a>. "There are so many other benefits of omega 3s, even if it doesn't help your headaches, there's no reason not to try it," says Mauskop. <em>Flickr photo by <a href="" target="_hplink"></a></em>

  • Sniff Peppermint

    As anyone who gets headaches knows, certain smells can trigger the pain. But peppermint in particular seems to have pain-<em>reducing</em> effects, says Mauskop. "It's very individual," he says, and may not work for everyone. Or, it could just mask less pleasant smells.

  • Ginger

    This spice is well-known for being friendly to <a href="" target="_hplink">upset stomachs</a>, and it can ease migraine-related nausea, too, says Mauskrop. It may also ease pain thanks to some <a href="" target="_hplink">anti-inflammatory properties</a>. Just be sure you're getting the real thing, he says -- ginger ale doesn't cut it. <em>Flickr photo by <a href="" target="_hplink">mfdudu</a></em>

  • Rubbing The Temples

    There may not be a body of research to support a simple head rub, but there's no denying it feels good! People instinctively rub their temples in the throes of a headache, and if it works for them, why not? "Whatever feels good, do that!" says Mauskop.

  • Massage

    In a similar vein, a whole-body massage can help, too. Part of that is likely due to the stress relief, as tension is a known headache trigger. A small study found that frequent migraine sufferers had <a href="" target="_hplink">fewer headaches following six weekly massage sessions</a>. However, it's likely that <a href="" target="_hplink">you'd have to continue the relaxing practice</a> -- indefinitely -- which could get pricey!

  • Meditation

    One way to reap the stress-reducing benefits for free is a quiet meditation practice, says Mauskop, who lists meditation as one of his top two natural migraine treatments. There remains <a href="" target="_hplink">little concrete evidence</a> that meditation in particular can ease the pain, reported, but it is certainly a <a href="" target="_hplink">proven stress reliever</a>.

  • Drink More Water

    Plenty of headaches are triggered by dehydration -- so much so that Mauskop says he has patients who will quickly drink a few glasses of H2O when they feel a migraine coming on, and actually stop it in its tracks. "They know to catch it early," he says, "that definitely can help." Not a huge water fan? There are plenty of ways to snazz up a glass or trick yourself into sipping more throughout the day <a href="" target="_hplink">here</a>. <em>Flickr photo by <a href="" target="_hplink">Greg Riegler Photography</a></em>

  • Acupuncture

    There have been mixed results in the research examining this ancient Chinese medicine's effect on migraines. Most recently, a study questioned <a href="" target="_hplink">whether the traditional practice offered much more than a placebo effect</a>, perhaps due to the extra attention lavished by the acupuncturist. Proponents maintain that the needles trigger pain-reducing chemicals, Reuters reported, but all those visits could become time consuming and expensive, points out Mauskop. A DIY altnerative might be acupressure, he says. Try pressing on the webbed space between your thumb and pointer finger. It may only be temporary, but it can offer relief.

  • Caffeine

    "Caffeine is a double-edged sword," says Mauskop. If you're too dependent on multiple cups of coffee a day (or even frequent doses of certain headache medications formulated with caffeine) you're likely to experience <a href="" target="_hplink">rebound headaches when the jolt starts to wane</a>. However, in small doses, a little bit can help reduce pain. <em>Flickr photo by <a href="" target="_hplink">OiMax</a></em>

  • Regular Exercise

    Along with meditation, Mauskrop calls staying active one of his top two most effective ways to prevent and treat migraines. Of course, many people are in too much pain in the middle of a headache to even think about heading to the gym. But a few people have told him when they feel something coming on, they can go out for a jog and avoid the migraine altogether. "It relaxes you, it releases endorphins," he says. Last year, a small Swedish study attempted to find out just how good exercise is at preventing migraines and discovered a solid sweat session was <a href="" target="_hplink">just as effective as migraine medications</a> at keeping the debilitating headaches at bay. <em>Flickr photo by <a href="" target="_hplink">Dafydd359</a></em>

  • Cool Down -- And Warm Up

    Many people will feel a chill when they get a migraine, explains Mauskop, while at the same time their heads feel "hot and cloudy" he says. For some temporary relief, try reversing the feelings -- cool your head with an ice pack while warming the body in the bath, he suggests. Granted, it's not very practical unless you're at home and have plenty of time, he says, but dilating the blood vessels in the body may help blood flow away from the head and reduce some of the pain, he says.