, CARDIAC STIMULANTS
Def.: These are the drugs which increase the heart rate
1. Sympathomimetics
As adrenaline and isoprenaline
Acc. to mode of action
Act by stimulating cardiac β 1 receptor
2. Parasympatholytics:
As atropine and hyoscine
Act by blocking M-receptors on cardiac muscle
3. Direct stimulants:
As caffeine and theophylline
Act directly on cardiac muscle & vasomotor center as w
4. Reflex stimulants:
As camphor and ether when injected S/C,
, CARDIAC TONICS
Def.: These are the drugs which improve cardiac functio
1. Digitalis:
Contains the glycosides digitoxin, gitoxin and digitalin.
Acc. to source
2. Strophanthus:
Contains the glycoside strophanthin
Stronger diuretic as it has no vasoconstrictor effect
Less irritant to gastric mucosa
Can be given orally and i.v.
3. Squill:
Contains the glycoside scillarin
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