But high levels of caffeine could affect your high in the opposite way, leading you to use more marijuana. Caffeine helps many people feel more alert. You might drink coffee, tea, or energy drinks every morning to help you wake up, or just to help increase your concentration when you feel tired or less focused than usual. Some people also find caffeine helps improve working memory.
Marijuana, on the other hand, is known for its less desirable effect on memory. A study looking at how a combination of caffeine and THC affected memory in rats. The results suggest that a combination of caffeine and a low dose of THC seemed to impair working memory more than a higher dose of THC would on its own.
Remember, this study was only done using rats, so its unclear how these results translate in humans. Still, it does suggest that caffeine may increase the effects of THC. Plus, people can have varying reactions to both caffeine and marijuana. If you do try mixing the two, make sure you first understand how your body reacts to each one individually. If you do decide to mix marijauna and caffeine, follow these tips to help you avoid a bad reaction:. There are serious side effects that can come from ingesting very high doses of caffeine, from high blood pressure to rapid heart rate.
There have also been deaths related to ingesting large amounts of caffeine, though researchers noted that the deceased took caffeine pills or powder, not caffeinated drinks. You're fresh, recharged, and ready to go. Zeratsky says this "high-yield way to take advantage" of coffee's benefits can give him around two hours of focused energy.
Instead of drinking a big cup of coffee, which has a high dose of caffeine, the technologists recommend having green tea or espresso, which have lower doses of caffeine. One cheap and easy way to do this is to "buy a box of green tea bags, substitute two or three cups of tea for every cup of coffee you would normally have.
Knapp and Zeratsky note that the half-life of caffeine is five to six hours, which means that if you drink coffee at 4 p. If there is coffee in your bloodstream, you'll likely feel too wired to go to sleep. Like this story? Don't miss:. Millions of people rely on caffeine every day to stay alert and improve concentration.
Up to milligrams mg of caffeine a day appears to be safe for most healthy adults. That's roughly the amount of caffeine in four cups of brewed coffee, 10 cans of cola or two "energy shot" drinks.
Keep in mind that the actual caffeine content in beverages varies widely, especially among energy drinks. Caffeine in powder or liquid form can provide toxic levels of caffeine, the U.
Food and Drug Administration has cautioned. Just one teaspoon of powdered caffeine is equivalent to about 28 cups of coffee. Such high levels of caffeine can cause serious health problems and possibly death. Although caffeine use may be safe for adults, it's not a good idea for children. Adolescents and young adults need to be cautioned about excessive caffeine intake and mixing caffeine with alcohol and other drugs.
Women who are pregnant or who are trying to become pregnant and those who are breast-feeding should talk with their doctors about limiting caffeine use to less than mg daily. Even among adults, heavy caffeine use can cause unpleasant side effects. And caffeine may not be a good choice for people who are highly sensitive to its effects or who take certain medications. You may want to cut back if you're drinking more than 4 cups of caffeinated coffee a day or the equivalent and you have side effects such as:.
Some people are more sensitive to caffeine than are others. If you're susceptible to the effects of caffeine, even small amounts may prompt unwanted effects, such as restlessness and sleep problems. How you react to caffeine may be determined in part by how much caffeine you're used to drinking.
People who don't regularly drink caffeine tend to be more sensitive to its effects. Caffeine, even in the afternoon, can interfere with your sleep. Even small amounts of sleep loss can add up and disturb your daytime alertness and performance.
Using caffeine to mask sleep deprivation can create an unwelcome cycle. For example, you may drink caffeinated beverages because you have trouble staying awake during the day. But the caffeine keeps you from falling asleep at night, shortening the length of time you sleep. Whether it's for one of the reasons above or because you want to trim your spending on coffee drinks, cutting back on caffeine can be challenging.
Drinking a cup of coffee, or eating a bar of chocolate, is usually not a big deal. Here are a few alternatives you can try to feel energized without overdoing the caffeine:. PDF documents require the free Adobe Reader. Skip to main content. Search form. Archive Home. Cite this article. Sara Bellum June 25
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