Use caffeine cautiously if you have a bleeding disorder. Bleeding disorders: Caffeine might aggravate bleeding disorders. Use caffeine cautiously and in low amounts if you have bipolar disorder. Bipolar disorder: Too much caffeine might make this condition worse. Use caffeine cautiously and in low amounts if you have anxiety. Anxiety disorders: Caffeine might make these conditions worse.

Children: Caffeine is possibly safe when used by children and adolescents in amounts commonly found in foods. High caffeine intake while nursing can cause sleeping problems, irritability, and increased bowel activity in breast-fed infants. Caffeine might increase the chance of miscarriage and other problems. Consuming larger amounts during pregnancy or when breast-feeding is possibly unsafe. This is about the amount in 3 cups of coffee. Consuming up to 300 mg of caffeine daily appears to be safe. Pregnancy and breast-feeding: Caffeine is possibly safe during pregnancy and breast-feeding when used in amounts commonly found in foods. IV products can only be given by a healthcare provider. Taking caffeine by mouth or by IV seems to help prevent headache that can occur after these procedures. Headache after epidural anesthesia, spinal anesthesia, or lumbar puncture.Taking caffeine by mouth together with painkillers such as ibuprofen can reduce pain more than painkillers alone.

Even in carefully monitored and otherwise healthy adults, caffeine/ephedra combinations can cause changes in blood pressure and heart rate. Taking caffeine by mouth together with ephedrine seems to increase weight loss, short-term. Taking caffeine by mouth seems to improve short-term memory in college students or people with outgoing personalities. But it's not clear if consuming caffeine helps to treat diabetes. Drinking beverages that contain caffeine is linked with a lower risk of developing type 2 diabetes. Giving caffeine by mouth or by IV to premature infants seems to reduce the risk for this lung problem.

A lung disease that affects newborns (bronchopulmonary dysplasia).

But taking more than 800 mg of caffeine daily (6-8 cups) can lead to caffeine levels greater than those allowed by the National Collegiate Athletic Association (NCAA). Taking caffeine by mouth seems to increase physical strength and endurance and might delay fatigue during exercise. Urine concentrations over 15 mcg/mL are prohibited. Taking caffeine, within limits, is allowed by the National Collegiate Athletic Association (NCAA). It's illegal in the US for these products to be sold to consumers in bulk. People can easily take doses that are much too high by mistake. Caffeine products sold in very concentrated or pure forms are a health concern. It is also used for asthma, gallbladder disease, ADHD, low blood pressure, depression, and many other conditions, but there is no good scientific evidence to support most of these other uses. People most commonly use caffeine for mental alertness, headache, migraine, athletic performance, memory, and obesity. Caffeine can also act like a 'water pill' that increases urine flow. Caffeine can raise blood pressure, but might not have this effect in people who use it all the time. Caffeine works by stimulating the central nervous system, heart, muscles, and the centers that control blood pressure. It is found in coffee, tea, cola, cocoa, guarana, yerba mate, and over 60 other products. Caffeine is a natural chemical with stimulant effects.

Caffeine app