What is dextroamphetamine-oral capsule, tablet, and how does it work (mechanism of action)? Dextroamphetamine is a medication used for treating attention-deficit hyperactivity disorder (ADHD) and narcolepsy. ADHD is a common disorder among children and teenagers that affects social, academic, and occupational functioning. Narcolepsy also is known as excessive daytime sleepiness, which is more common in adults. Dextroamphetamine is an amphetamine...
guaifenesin, phenylephrine (Sudafed PE Non-Drying Sinus Caplets)
What is guaifenesin, phenylephrine, and how does it work (mechanism of action)? Guaifenesin/phenylephrine is a medication that contains two different drugs, an expectorant (guaifenesin) and a decongestant (phenylephrine). The expectorant effects of guaifenesin promote drainage of mucus from the lungs by thinning the mucus. It also lubricates the irritated respiratory tract. Phenylephrine relieves stuffy nose by constricting blood vessels in...
bitolterol mesylate, Tornalate: Drug Side Effects and Dosing
What is bitolterol mesylate, and how does it work (mechanism of action)? Bitolterol is a bronchodilator used in the treatment of asthma. It is similar to albuterol (Ventolin). Asthma is a disorder of breathing in which there is narrowing of the airways that carry air to the lungs including the bronchi. This narrowing is caused by muscle spasm and inflammation...
guarana (Paullinia cupana, Zoom, Brazilian Cocoa)
What is guarana (Paullinia cupana)-oral, and how does it work (mechanism of action)? Guarana is a natural herbal supplement. The exact mechanism of how guarana works is not known. Guarana contains more than 2.5% to 5% caffeine by weight. Caffeine is a stimulant and is most likely responsible for most of guarana's effects. There is no scientific evidence that guarana...
methylphenidate patch (Daytrana): Side Effects and Dosing
What is methylphenidate patch, and how does it work (mechanism of action)? Methylphenidate is a medication used for treating attention deficit hyperactivity disorder (ADHD). It stimulates the central nervous system (CNS or brain) in a manner that is similar to amphetamines; however, its actions are milder than amphetamines. Amphetamines stimulate the brain by increasing the level of neurotransmitters, dopamine and...
Feverfew (Tanacetum parthenium): Side Effects and Dosage
What is feverfew (tanacetum parthenium)-oral, and how does it work (mechanism of action)? Tanacetum parthenium is an herb. The leaves are used as a natural herbal supplement. Tanacetum parthenium contains parthenolide, which works on serotonin receptors in the brain, giving relief from migraine headaches. Tanacetum parthenium is also believed to have anti-inflammatory, pain relieving, and anti-histamine effects. Check with your...
beclomethasone dipropionate inhaler (Qvar) Side Effects
What is beclomethasone dipropionate inhaler, and how does it work? Beclomethasone is a synthetic steroid drug of the glucocorticoid family. The naturally-occurring glucocorticoid (cortisol or hydrocortisone) is produced in the adrenal glands. Glucocorticoid steroids have potent anti-inflammatory actions. When used as an inhaler, the medication goes directly into the lungs, and very little finds its way into the rest of...
dapagliflozin (Farxiga): Click for Side Effects and Dosage
What is dapagliflozin, and how does it work (mechanism of action)? Dapagliflozin (Farxiga) is an oral medication used to improve glycemia (blood glucose) control in patients with type 2 diabetes. Dapagliflozin is a sodium-glucose cotransporter (SGLT2) inhibitor. It is similar to canagliflozin (Invokana) and empagliflozin (Jardiance). SGLT2 is found in the kidney tubules and is responsible for reabsorbing the majority...
clonidine (Kapvay extended-release): Click for Side Effects
What is clonidine (Kapvay extended-release), and how does it work (mechanism of action)? Kapvay is an oral medication used to treat attention deficit hyperactivity disorder (ADHD) in children and adolescents. This drug has been used to reduce blood pressure in adults for many years but has been approved for another indication by the FDA. Kapvay works by stimulating alpha-2 receptors...
pemoline (Cylert): Drug Facts, Side Effects and Dosing
What is Cylert (pemoline), and how does it work? Cylert (pemoline) is a central nervous system stimulant used to treat attention deficit hyperactivity disorder (ADHD). The brand name Cylert is no longer available in the U.S. Generic versions may be available. Cylert (pemoline) is a central nervous system stimulant. Pemoline is structurally dissimilar to the amphetamines and methylphenidate. It is...