Tag Archives: Phenylephrine

Ammonium Chloride (Uroeze)

Acidifying Agent Highlights Of Prescribing Information • Urinary acidifier; treatment of metabolic alkalosis • Contraindicated in patients with hepatic failure or uremia • Potential adverse effects are primarily GI distress; IV use may lead to metabolic acidosis • May increase excretion of quinidine; decrease efficacy of erythromycin or aminoglycosides in urine What Is Ammonium Chloride… Read More »

Acepromazine Maleate (PromAce, Aceproject)

Phenothiazine Sedative / Tranquilizer Highlights Of Prescribing Information • Negligible analgesic effects • Dosage may need to be reduced in debilitated or geriatric animals, those with hepatic or cardiac disease, or when combined with other agents • Inject IV slowly; do not inject into arteries • Certain dog breeds (e.g., giant breeds, sight hounds) may… Read More »

Postanesthetic Upper Respiratory Tract Obstruction

Upper respiratory tract () obstruction can occur in horses recovering from general anesthesia after various surgical procedures. Postanesthetic upper respiratory tract obstruction most often results from nasal edema and/or congestion and is usually mild. Other causes include arytenoid chondritis, dorsal displacement of the soft palate, and bilateral arytenoid cartilage paralysis. Bilateral arytenoid cartilage paralysis is… Read More »

Tetralogy of Fallot

The defining anatomic features of tetralogy of Fallot include right ventricular outflow obstruction (pulmonic stenosis), secondary right ventricular hypertrophy, a subaortic ventricular septal defect, and a rightward-positioned aorta. Pulmonic stenosis that occurs in combination with an isolated ventricular septal defect produces similar findings, but the infundibular septum is not malaligned, the aorta is normal in… Read More »

Mydriatics and cycloplegics

Adrenoceptor stimulants (sympathomimetics) such as epinephrine (adrenaline) and phenylephrine dilate the pupil by stimulating the dilator muscle of the iris. Antimuscarinic drugs such as atropine paralyse the iris sphincter muscle and the ciliary muscle (cycloplegia). Atropine is frequently used to relieve muscle spasm, and therefore pain, associated with anterior uveitis (iridocyclitis). It is also useful… Read More »