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For symptomatic bradycardia, the usual dosage is 0.5 to 1 mg IV push; this may be repeated every 3 to 5 minutes, up to a total dose of 3 mg (maximum 0.04 mg/kg). [23] Atropine is also useful in treating second-degree heart block Mobitz type 1 (Wenckebach block), and also third-degree heart block with a high Purkinje or AV-nodal escape rhythm.
The typical dose is 1.5 mg/kg IV given three minutes prior to intubation. [34] Atropine may also be used as a premedication agent in pediatrics to prevent bradycardia caused by hypoxia, laryngoscopy, and succinylcholine. Atropine is a parasympathetic blocker. The common premedication dose for atropine is 0.01–0.02 mg/kg.
Intraperitoneal injection or IP injection is the injection of a substance into the peritoneum (body cavity). It is more often applied to non-human animals than to humans. In general, it is preferred when large amounts of blood replacement fluids are needed or when low blood pressure or other problems prevent the use of a suitable blood vessel for intravenous injection.
If a person is unstable, the initial recommended treatment is intravenous atropine. [34] Doses less than 0.5 mg should not be used, which may further decrease the rate. [34] If this is ineffective, intravenous inotrope infusion (dopamine, epinephrine) or transcutaneous pacing should be used. [34]
So, the maintenance dose of foosporin is 100 milligrams (100 mg) per day—just enough to offset the amount cleared. Suppose a patient just started taking 100 mg of foosporin every day. On the first day, they'd have 100 mg in their system; their body would clear 10 mg, leaving 90 mg.
It is given at a does of 1 mg (iv), and additional 1 mg (iv) doses can be given every 3–5 minutes for a total of 3 mg. However, the 2010 guidelines from the American Heart Association removed the recommendation for atropine use in pulseless electrical activity and asystole for lack of evidence supporting its use. [118] [81]
However, scopolamine has greater effects on the central nervous system (CNS) than atropine due to its ability to cross the blood–brain barrier. [4] At higher-than-therapeutic doses, atropine and scopolamine cause CNS depression characterized by amnesia, fatigue, and reduction in rapid eye movement sleep.
Drug titration is the process of adjusting the dose of a medication for the maximum benefit without adverse effects. [ 1 ] When a drug has a narrow therapeutic index , titration is especially important, because the range between the dose at which a drug is effective and the dose at which side effects occur is small. [ 2 ]