Dimetapp Paediatric Elixir is contra-indicated in patients sensitive to any of the ingredients and in infants or neonates. It should not be given to patients whose sensitivity to small doses of sympathomimetic substances is manifested by sleeplessness, dizziness, light headaches, weakness, tremulousness or cardiac arrhythmia.
In fact, worrying (or anxiety) can stimulate the release of epinephrine into your system, whereby it will bind with your beta-adrenergic receptors in your liver, causing your blood vessels to constrict and your blood pressure to rise, along with your heart rate (pulse).
What does epinephrine do in a lidocaine injection? constricts blood flow in capillaries via alpha 1 receptor (same as phenylephrine or over the counter cold remedies which are alpha 1 agonists) What does epinephrine do in an inhaler or endogenous epinephrine? dilate airway smooth muscle or large blood vessels via beta 2 receptors What are the 5 types of muscarinic receptors that mediate PNS control in different tissues?