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The extent of vasoconstriction may be slight or severe depending on the substance or circumstance. Many vasoconstrictors also cause pupil dilation. Medications that cause vasoconstriction include: antihistamines, decongestants, and stimulants. Severe vasoconstriction may result in symptoms of intermittent claudication. [1]
Most side effects are direct consequences of the vasodilation and the resultant low blood pressure. They include headache ("nitrate headache") resulting from the widening of blood vessels in the brain, reflex tachycardia (fast heart rate), flush, dizziness, nausea and vomiting. These effects usually subside after a few days if the treatment is ...
Side effects of midodrine include hypertension (high blood pressure), paresthesia, itching, goosebumps, chills, urinary urgency, urinary retention, and urinary frequency. [3] Midodrine is a prodrug of its active metabolite desglymidodrine. [3] [1] This metabolite acts as a selective agonist of the α 1-adrenergic receptor.
Therefore, blocking β 2-adrenoceptors lowers plasma glucose. β 1-blockers have fewer metabolic side effects in diabetic patients; however, the fast heart rate that serves as a warning sign for insulin-induced low blood sugar may be masked, resulting in hypoglycemia unawareness. This is termed beta blocker-induced hypoglycemia unawareness ...
Bradycardia; Hypertension (high blood pressure); Allergic reactions (e.g. dyspnoea (shortness of breath), bronchospasm, wheezing, angioneurotic oedema) Anaphylaxis; Changes in appetite
However, because there are several structural compositions that make each alpha blocker different, the side effects are different for each drug. Side effects that arise when taking alpha blockers can include the first dose effect, cardiovascular side effects, genitourinary side effects, as well as other side effects. [28]
Regarding non-cardiac side effects, they can cause nausea, headache, fatigue, dry mouth, and dry eyes. [4] In rare cases, confusion , memory loss , and sexual dysfunction are reported. [ 12 ] Additionally, beta 1 blockers can mask hypoglycaemia-induced tachycardia in diabetic patients, potentially leading to hypoglycaemic unawareness and ...
The choice between the drugs is to a large degree determined by the characteristics of the patient being prescribed for, the drugs' side effects, and cost. Most drugs have other uses; sometimes the presence of other symptoms can warrant the use of one particular antihypertensive. Examples include: Age can affect the choice of medications.