Leaf spot is a very common disease that affects irises in our area. It can affect bulbous and rhizomatatous types of irises, but is most often a problem on bearded irises. Leaf spot is caused by the fungus Mycosphaerella macrospora, which was formerly known as Didymellina macrospora.
A few cups of coffee throughout the day can make a real difference. Some studies have found that caffeine can boost concentration for people with ADHD. Since itâs a stimulant drug, it mimics some of the effects of stronger stimulants used to treat ADHD, such as amphetamine medications.However, caffeine alone is less effective than prescription medications.educed Blood Flow to the Brain. Caffeine is also a vasoconstrictor. That means it makes blood vessels smaller and reduces blood flow. This reduced blood flow is why caffeine helps headaches. Amphetamine medications used to treat ADHD also make blood vessels smaller.
School of Medicine, Family Medicine answered. Caffeine can affect headaches in different ways. For some people, caffeine helps to relieve a stress headache or migraine. It is believed to do this by altering blood flow to the blood vessels in the brain.However, caffeine withdrawal in someone who regularly drinks coffee or energy drinks or uses caffeine pills may also cause headaches.any headache medications contain caffeine, which definitely makes these medications work better. Many patients find having a cup of coffee or other caffeine-containing beverage with their medication helps it work better.