Interactions between Guiatex and Midodrine

The phenylephrine and phenylpropanolamine in Guiatex both have a moderate potential interaction with Benign Prostatic Hyperplasia.

Sympathomimetic agents may cause or worsen urinary difficulty in patients with prostate enlargement due to smooth muscle contraction in the bladder neck via stimulation of alpha-1 adrenergic receptors. Therapy with sympathomimetic agents should be administered cautiously in patients with hypertrophy or neoplasm of the prostate.

The phenylephrine and phenylpropanolamine in Guiatex both have a major potential interaction with Cardiovascular Conditions and Disorders.

Sympathomimetic agents may cause adverse cardiovascular effects, particularly when used in high dosages and/or in susceptible patients. In cardiac tissues, these agents may produce positive chronotropic and inotropic effects via stimulation of beta- 1 adrenergic receptors. Cardiac output, oxygen consumption, and the work of the heart may be increased. In the peripheral vasculature, vasoconstriction may occur via stimulation of alpha-1 adrenergic receptors. Palpitations, tachycardia, arrhythmia, hypertension, reflex bradycardia, coronary occlusion, cerebral vasculitis, myocardial infarction, cardiac arrest, and death have been reported. Some of these agents, particularly ephedra alkaloids (ephedrine, ma huang, phenylpropanolamine), may also predispose patients to hemorrhagic and ischemic stroke. Therapy with sympathomimetic agents should generally be avoided or administered cautiously in patients with sensitivity to sympathomimetic amines, hyperthyroidism, or underlying cardiovascular or cerebrovascular disorders. These agents should not be used in patients with severe coronary artery disease or severe/uncontrolled hypertension.

The phenylephrine and phenylpropanolamine in Guiatex both have a major potential interaction with Cerebrovascular Insufficiency.

Sympathomimetic agents may cause adverse cardiovascular effects, particularly when used in high dosages and/or in susceptible patients. In cardiac tissues, these agents may produce positive chronotropic and inotropic effects via stimulation of beta- 1 adrenergic receptors. Cardiac output, oxygen consumption, and the work of the heart may be increased. In the peripheral vasculature, vasoconstriction may occur via stimulation of alpha-1 adrenergic receptors. Palpitations, tachycardia, arrhythmia, hypertension, reflex bradycardia, coronary occlusion, cerebral vasculitis, myocardial infarction, cardiac arrest, and death have been reported. Some of these agents, particularly ephedra alkaloids (ephedrine, ma huang, phenylpropanolamine), may also predispose patients to hemorrhagic and ischemic stroke. Therapy with sympathomimetic agents should generally be avoided or administered cautiously in patients with sensitivity to sympathomimetic amines, hyperthyroidism, or underlying cardiovascular or cerebrovascular disorders. These agents should not be used in patients with severe coronary artery disease or severe/uncontrolled hypertension.

Midodrine has a major potential interaction with Diabetes Mellitus.

Midodrine can cause marked elevation of supine blood pressure (BP>200 mmHg systolic) and should not be used in patients with persistent and excessive supine hypertension. Systolic elevations of this degree are most likely to be observed in patients with relatively elevated pre-treatment systolic blood pressures (mean 170 mmHg). There is no experience in patients with initial supine systolic pressure above 180 mmHg, as those patients were excluded from the clinical trials. Use of midodrine in such patients is not recommended. Additionally, care should be taken when using this agent in orthostatic hypotensive patients who are also diabetic. Supine and sitting hypertension should be evaluated at the beginning of therapy, and blood pressure (supine, sitting, and orthostatic) should be monitored regularly.

The phenylephrine and phenylpropanolamine in Guiatex both have a moderate potential interaction with Diabetes Mellitus.

Sympathomimetic agents may cause increases in blood glucose concentrations. These effects are usually transient and slight but may be significant with dosages higher than those normally recommended. Therapy with sympathomimetic agents should be administered cautiously in patients with diabetes mellitus. Closer monitoring of blood glucose concentrations may be appropriate.

The phenylephrine and phenylpropanolamine in Guiatex both have a moderate potential interaction with Glaucoma/Intraocular Hypertension.

Sympathomimetic agents can induce transient mydriasis via stimulation of alpha-1 adrenergic receptors. In patients with anatomically narrow angles or narrow-angle glaucoma, pupillary dilation can provoke an acute attack. In patients with other forms of glaucoma, mydriasis may occasionally increase intraocular pressure. Therapy with sympathomimetic agents should be administered cautiously in patients with or predisposed to glaucoma, particularly narrow-angle glaucoma.

Midodrine has a major potential interaction with Heart Disease.

The use of midodrine is contraindicated in patients with severe organic heart disease, pheochromocytoma, or thyrotoxicosis.

Midodrine has a major potential interaction with High Blood Pressure.

Midodrine can cause marked elevation of supine blood pressure (BP>200 mmHg systolic) and should not be used in patients with persistent and excessive supine hypertension. Systolic elevations of this degree are most likely to be observed in patients with relatively elevated pre-treatment systolic blood pressures (mean 170 mmHg). There is no experience in patients with initial supine systolic pressure above 180 mmHg, as those patients were excluded from the clinical trials. Use of midodrine in such patients is not recommended. Additionally, care should be taken when using this agent in orthostatic hypotensive patients who are also diabetic. Supine and sitting hypertension should be evaluated at the beginning of therapy, and blood pressure (supine, sitting, and orthostatic) should be monitored regularly.

The phenylephrine and phenylpropanolamine in Guiatex both have a major potential interaction with Hyperthyroidism.

Sympathomimetic agents may cause adverse cardiovascular effects, particularly when used in high dosages and/or in susceptible patients. In cardiac tissues, these agents may produce positive chronotropic and inotropic effects via stimulation of beta- 1 adrenergic receptors. Cardiac output, oxygen consumption, and the work of the heart may be increased. In the peripheral vasculature, vasoconstriction may occur via stimulation of alpha-1 adrenergic receptors. Palpitations, tachycardia, arrhythmia, hypertension, reflex bradycardia, coronary occlusion, cerebral vasculitis, myocardial infarction, cardiac arrest, and death have been reported. Some of these agents, particularly ephedra alkaloids (ephedrine, ma huang, phenylpropanolamine), may also predispose patients to hemorrhagic and ischemic stroke. Therapy with sympathomimetic agents should generally be avoided or administered cautiously in patients with sensitivity to sympathomimetic amines, hyperthyroidism, or underlying cardiovascular or cerebrovascular disorders. These agents should not be used in patients with severe coronary artery disease or severe/uncontrolled hypertension.

Midodrine has a moderate potential interaction with Liver Disease.

Midodrine, a prodrug, undergoes bioactivation in a variety of tissues to desglymidodrine, an alpha-1 agonist. The liver functions in the metabolism of midodrine and desglymidodrine. The pharmacokinetic disposition of midodrine has not been studied in patients with hepatic impairment. Therapy with midodrine should be administered cautiously in patients with compromised hepatic function. Clinical monitoring of hepatic function prior to initiation of therapy.

The phenylephrine in Guiatex has a major potential interaction with Pheochromocytoma.

Sympathomimetic agents may cause adverse cardiovascular effects, particularly when used in high dosages and/or in susceptible patients. In cardiac tissues, these agents may produce positive chronotropic and inotropic effects via stimulation of beta- 1 adrenergic receptors. Cardiac output, oxygen consumption, and the work of the heart may be increased. In the peripheral vasculature, vasoconstriction may occur via stimulation of alpha-1 adrenergic receptors. Palpitations, tachycardia, arrhythmia, hypertension, reflex bradycardia, coronary occlusion, cerebral vasculitis, myocardial infarction, cardiac arrest, and death have been reported. Some of these agents, particularly ephedra alkaloids (ephedrine, ma huang, phenylpropanolamine), may also predispose patients to hemorrhagic and ischemic stroke. Therapy with sympathomimetic agents should generally be avoided or administered cautiously in patients with sensitivity to sympathomimetic amines, hyperthyroidism, or underlying cardiovascular or cerebrovascular disorders. These agents should not be used in patients with severe coronary artery disease or severe/uncontrolled hypertension.

Midodrine has a major potential interaction with Pheochromocytoma.

The use of midodrine is contraindicated in patients with severe organic heart disease, pheochromocytoma, or thyrotoxicosis.

The phenylephrine and phenylpropanolamine in Guiatex both have a moderate potential interaction with Prostate Tumor, Benign.

Sympathomimetic agents may cause or worsen urinary difficulty in patients with prostate enlargement due to smooth muscle contraction in the bladder neck via stimulation of alpha-1 adrenergic receptors. Therapy with sympathomimetic agents should be administered cautiously in patients with hypertrophy or neoplasm of the prostate.

The phenylpropanolamine in Guiatex has a moderate potential interaction with Psychiatric Disorders.

Phenylpropanolamine may precipitate or exacerbate psychotic symptoms, particularly at high dosages. Therapy with phenylpropanolamine should be administered cautiously in patients with a history of psychiatric disorders.

The phenylpropanolamine in Guiatex has a moderate potential interaction with Psychosis.

Phenylpropanolamine may precipitate or exacerbate psychotic symptoms, particularly at high dosages. Therapy with phenylpropanolamine should be administered cautiously in patients with a history of psychiatric disorders.

Midodrine has a major potential interaction with Renal Dysfunction.

The use of midodrine is contraindicated in patients with acute renal disease or urinary retention/obstruction disorder. Midodrine is primarily eliminated by the kidney as desglymidodrine (active metabolite). The serum concentration of midodrine is expected to be increased in patients with renal impairment. Desglymidodrine induces urinary retention by increasing bladder neck tone. Therapy with midodrine should be administered cautiously and initiated at 2.5 mg doses in patients with compromised renal function. Clinical monitoring of renal function prior to initiation of therapy and subsequently as appropriate and blood pressure (supine, sitting, and orthostatic) is recommended. Midodrine is removed by dialysis.

Midodrine has a major potential interaction with Thyrotoxicosis.

The use of midodrine is contraindicated in patients with severe organic heart disease, pheochromocytoma, or thyrotoxicosis.

Midodrine has a major potential interaction with Urinary Retention.

The use of midodrine is contraindicated in patients with acute renal disease or urinary retention/obstruction disorder. Midodrine is primarily eliminated by the kidney as desglymidodrine (active metabolite). The serum concentration of midodrine is expected to be increased in patients with renal impairment. Desglymidodrine induces urinary retention by increasing bladder neck tone. Therapy with midodrine should be administered cautiously and initiated at 2.5 mg doses in patients with compromised renal function. Clinical monitoring of renal function prior to initiation of therapy and subsequently as appropriate and blood pressure (supine, sitting, and orthostatic) is recommended. Midodrine is removed by dialysis.