### steroid:

Digoxin
* also depresses the electrical activity of the heart
  - reduces pulmonary and peripheral edema
* attempts to put the heart back into a normal pattern of beating.
* benefits for heart failure patients are independent of age.
* can improve function and slows heart rate and atrioventricular conduction
  - increase cardiac output and reduce circulating neurohormones
  - lead to side effects if the dosage is too high
* causes an increase in vagal tone which decreases the rate of SA node depolarization.
* chemical found in the foxglove plant.
* comes as pills and as a liquid
  - in a flavored liquid form
* common heart medicine.
* crosses both the blood-brain barrier and the placenta.
* drug used to treat some heart conditions
  - problems
* follows multiphasic distribution.
* has a delayed onset of action of two hours
  - similar ring structure to estrogen
  - no effect on blood pressure
* helps by slowing down and controlling the heart rate
  - the heart pump better
* highly effective substance used in many cardiac stimulants.
* increases the power of each heartbeat and slows a heart rate that's too rapid.
* interacts with many other drugs.
* is also is associated with an increased incidence of Xerostomia
  - an ancient drug obtained from the foxglove plant
  - available for oral and intravenous administration
  - by no means the only drug used to treat heart disease and dysrhythmias
  - concentrated in tissues and therefore has a large apparent volume of distribution
  - given by mouth and absorbed by the stomach
  - prescribed for heart failure
* is prescribed to increase the force of each heart beat
  - treat congestive heart failure and some cardiac arrhythmias
  - recorded as interacting with many drugs in human medicine
  - released and the antibody is metabolized eventually in the liver
  - sometimes effective
  - the drug of choice for treatment of many SVTs
* is used in arrhythmias to slow and strengthen the heart
  - to increase the power of each heart beat and slows a too fast rate
* is used to treat atrial fibrillation
  - heart failure and different kinds of irregular heart beats
  - widely in the treatment of various arrhythmias
* known cause of gynecomastia.
* makes the heart beat more strongly.
* medication used frequently for patients with heart problems.
* medicine which comes from the foxglove plant
  - helps the heart to beat stronger
* positive inotrope and lowers heart rate.
* reduces -adrenergic contractile response in rabbit hearts.
* shows a rapid onset of action and is rapidly excreted.
* substrate for P-glycoprotein.
* takes the longest to slow the ventricular response.
* tends to be the least effective at controlling the rate with physical activity.
* usually has nothing to do with memory loss unless the drug is given in high or toxic levels
  - slows the ventricular response rate but only occasionally restores sinus rhythm
* works in two ways
  - to increase the strength of the heart muscle

Ergosterol
* is alcohol
  - an essential building block in the cell wall of higher fungi
  - the major sterol of fungal membranes
* sterol common to many fungi andmay be useful for estimating fungal biomass in soil.

Gonadal steroid
* have paradoxical effects on brain oxytocin receptors.
* regulate dendritic spine density in hippocampal pyramidal cells in adulthood
  - the number and activational state of mast cells in the medial habenula

Inhaled steroid
* are available in aerosols much like beta-agonists
  - curative
  - exceedingly safe for almost all patients with asthma
  - highly effective and very safe
  - now standard treatment for children with asthma from infancy
* are one of the main ways that asthma is controlled
  - most important long-term control medications
  - the most effective treatment to control asthma
  - very unlikely to cause side effects
* have severe side effects.