Can you take Phenylephrine / tropicamide ophthalmic with Terazosin?
1 drug interaction and 17 additional warnings found for the following 2 drugs:
- phenylephrine/tropicamide ophthalmic
- terazosin
Drug interactions
Moderate drug interactions
Moderate:
terazosin phenylephrine ophthalmic
Applies to: terazosin and phenylephrine / tropicamide ophthalmic
Using phenylephrine ophthalmic together with terazosin may decrease the effects of terazosin. If you are using terazosin to lower your blood pressure, the blood pressure lowering effects may be reduced.
Monitor your blood pressure more closely and speak with your healthcare provider if you have any questions or concerns, or if your condition changes.
It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.
Food/lifestyle interactions
Moderate food/lifestyle interactions
Moderate:
terazosin Alcohol (Ethanol)
Applies to: terazosin
Ask your doctor before using terazosin together with ethanol (alcohol).
Using terazosin with ethanol (alcohol) can lower your blood pressure. This can cause dizziness or feeling like you might pass out, especially when getting up from a sitting or lying position. This may be more likely to occur when you first start taking either of these medications.
You may need a dose adjustment or need your blood pressure checked more often if you take both medications.
You may develop flushing, warmth or redness under your skin or tingly feeling after alcohol intake (especially in you are of Asian descent) and should be advised to avoid alcohol or limit your intake.
It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.
Disease interactions
16 potential interactions Applies to: 16 conditions, including Benign Prostatic Hyperplasia, Diarrhea, Hypotension, Hyperthyroidism, and Diabetes Mellitus.
Autonomic Neuropathy
Moderate:
terazosin
Terazosin has a moderate potential interaction with Autonomic Neuropathy.
Peripheral alpha 1- adrenergic receptor blocking agents (aka alpha 1- blockers) cause vasodilation and can produce marked hypotension, especially orthostatic hypotension with syncope or other postural symptoms such as dizziness, lightheadedness, and palpitations. Orthostatic effects are most common during initiation of therapy and often occur within 90 minutes after the first dose. However, they can also occur following a dosage increase or resumption of therapy after an interruption of more than a few days. Agents with alpha 1a specificity, such as tamsulosin, act primarily on the prostate but are not devoid of hypotensive effects. Therapy with peripheral alpha-1 blockers should be administered cautiously in patients with or predisposed to hypotensive or syncopal episodes. Caution is also advised in patients who are dehydrated (e.g., due to severe or prolonged diarrhea or vomiting), since they may be more sensitive to the hypotensive effect of the drugs. Therapy should be initiated with the lowest dosage possible and titrated gradually based on patient response and tolerance in accordance with the individual product package labeling. During initiation or reinstitution of therapy and following an increase in dosage, patients should be advised not to rise abruptly from a sitting or recumbent position and to avoid situations where injury could result if syncope occur. Concomitant use of alcohol, extensive periods of standing, prolonged or intense exercise, and exposure to heat can also precipitate orthostatic hypotension and should be minimized. If dizziness, lightheadedness or palpitations occur, the patient should sit or lie down, and seek medical attention if symptoms are recurrent or bothersome.
Benign Prostatic Hyperplasia
Moderate:
phenylephrine / tropicamide ophthalmic
The phenylephrine ophthalmic in phenylephrine / tropicamide ophthalmic has a moderate potential interaction with Benign Prostatic Hyperplasia.
Topically applied sympathomimetic agents are systemically absorbed, with the potential for producing clinically significant systemic effects, particularly during prolonged or indiscriminate use. In patients with prostate enlargement, urinary difficulty may develop or worsen due to smooth muscle contraction in the bladder neck via stimulation of alpha-1 adrenergic receptors. Therapy with topical sympathomimetic agents should be administered cautiously in patients with hypertrophy or neoplasm of the prostate. It is important that the recommended dosages of the individual products not be exceeded.
Cardiovascular Conditions and Disorders
Moderate:
phenylephrine / tropicamide ophthalmic
The phenylephrine ophthalmic in phenylephrine / tropicamide ophthalmic has a moderate potential interaction with Cardiovascular Conditions and Disorders.
Topically applied sympathomimetic agents are systemically absorbed, with the potential for producing clinically significant systemic effects, particularly during prolonged or indiscriminate use. 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, and coronary occlusion have been reported rarely during the use of ophthalmic and nasal sympathomimetic agents, but may be more likely if the corneal epithelium is damaged or if an excessive amount of drug is swallowed during nasal administration. Therapy with topical sympathomimetic agents should be administered cautiously in patients with corneal abrasion, sensitivity to sympathomimetic amines, hyperthyroidism, or underlying cardiovascular or cerebrovascular disorders, especially coronary insufficiency, cardiac arrhythmia, or hypertension. The potent ophthalmic formulations (e.g., phenylephrine 2.5% or 10%) that are used for diagnostic and pre-surgical purposes should not be used in such patients. For other preparations, it is important that the recommended dosages of the individual products not be exceeded.
Cerebrovascular Insufficiency
Moderate:
phenylephrine / tropicamide ophthalmic
The phenylephrine ophthalmic in phenylephrine / tropicamide ophthalmic has a moderate potential interaction with Cerebrovascular Insufficiency.
Topically applied sympathomimetic agents are systemically absorbed, with the potential for producing clinically significant systemic effects, particularly during prolonged or indiscriminate use. 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, and coronary occlusion have been reported rarely during the use of ophthalmic and nasal sympathomimetic agents, but may be more likely if the corneal epithelium is damaged or if an excessive amount of drug is swallowed during nasal administration. Therapy with topical sympathomimetic agents should be administered cautiously in patients with corneal abrasion, sensitivity to sympathomimetic amines, hyperthyroidism, or underlying cardiovascular or cerebrovascular disorders, especially coronary insufficiency, cardiac arrhythmia, or hypertension. The potent ophthalmic formulations (e.g., phenylephrine 2.5% or 10%) that are used for diagnostic and pre-surgical purposes should not be used in such patients. For other preparations, it is important that the recommended dosages of the individual products not be exceeded.
Corneal Abrasion
Moderate:
phenylephrine / tropicamide ophthalmic
The phenylephrine ophthalmic in phenylephrine / tropicamide ophthalmic has a moderate potential interaction with Corneal Abrasion.
Topically applied sympathomimetic agents are systemically absorbed, with the potential for producing clinically significant systemic effects, particularly during prolonged or indiscriminate use. 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, and coronary occlusion have been reported rarely during the use of ophthalmic and nasal sympathomimetic agents, but may be more likely if the corneal epithelium is damaged or if an excessive amount of drug is swallowed during nasal administration. Therapy with topical sympathomimetic agents should be administered cautiously in patients with corneal abrasion, sensitivity to sympathomimetic amines, hyperthyroidism, or underlying cardiovascular or cerebrovascular disorders, especially coronary insufficiency, cardiac arrhythmia, or hypertension. The potent ophthalmic formulations (e.g., phenylephrine 2.5% or 10%) that are used for diagnostic and pre-surgical purposes should not be used in such patients. For other preparations, it is important that the recommended dosages of the individual products not be exceeded.
Dehydration
Moderate:
terazosin
Terazosin has a moderate potential interaction with Dehydration.
Peripheral alpha 1- adrenergic receptor blocking agents (aka alpha 1- blockers) cause vasodilation and can produce marked hypotension, especially orthostatic hypotension with syncope or other postural symptoms such as dizziness, lightheadedness, and palpitations. Orthostatic effects are most common during initiation of therapy and often occur within 90 minutes after the first dose. However, they can also occur following a dosage increase or resumption of therapy after an interruption of more than a few days. Agents with alpha 1a specificity, such as tamsulosin, act primarily on the prostate but are not devoid of hypotensive effects. Therapy with peripheral alpha-1 blockers should be administered cautiously in patients with or predisposed to hypotensive or syncopal episodes. Caution is also advised in patients who are dehydrated (e.g., due to severe or prolonged diarrhea or vomiting), since they may be more sensitive to the hypotensive effect of the drugs. Therapy should be initiated with the lowest dosage possible and titrated gradually based on patient response and tolerance in accordance with the individual product package labeling. During initiation or reinstitution of therapy and following an increase in dosage, patients should be advised not to rise abruptly from a sitting or recumbent position and to avoid situations where injury could result if syncope occur. Concomitant use of alcohol, extensive periods of standing, prolonged or intense exercise, and exposure to heat can also precipitate orthostatic hypotension and should be minimized. If dizziness, lightheadedness or palpitations occur, the patient should sit or lie down, and seek medical attention if symptoms are recurrent or bothersome.
Diabetes Mellitus
Moderate:
phenylephrine / tropicamide ophthalmic
The phenylephrine ophthalmic in phenylephrine / tropicamide ophthalmic has a moderate potential interaction with Diabetes Mellitus.
Topically applied sympathomimetic agents are systemically absorbed, particularly during prolonged or indiscriminate use. Slight increases in blood glucose concentrations may occur with the use of these drugs. Therapy with topical sympathomimetic agents should be administered cautiously in patients with diabetes mellitus. Closer monitoring of blood glucose concentrations may be appropriate. It is important that the recommended dosages of the individual products not be exceeded.
Diarrhea
Moderate:
terazosin
Terazosin has a moderate potential interaction with Diarrhea.
Peripheral alpha 1- adrenergic receptor blocking agents (aka alpha 1- blockers) cause vasodilation and can produce marked hypotension, especially orthostatic hypotension with syncope or other postural symptoms such as dizziness, lightheadedness, and palpitations. Orthostatic effects are most common during initiation of therapy and often occur within 90 minutes after the first dose. However, they can also occur following a dosage increase or resumption of therapy after an interruption of more than a few days. Agents with alpha 1a specificity, such as tamsulosin, act primarily on the prostate but are not devoid of hypotensive effects. Therapy with peripheral alpha-1 blockers should be administered cautiously in patients with or predisposed to hypotensive or syncopal episodes. Caution is also advised in patients who are dehydrated (e.g., due to severe or prolonged diarrhea or vomiting), since they may be more sensitive to the hypotensive effect of the drugs. Therapy should be initiated with the lowest dosage possible and titrated gradually based on patient response and tolerance in accordance with the individual product package labeling. During initiation or reinstitution of therapy and following an increase in dosage, patients should be advised not to rise abruptly from a sitting or recumbent position and to avoid situations where injury could result if syncope occur. Concomitant use of alcohol, extensive periods of standing, prolonged or intense exercise, and exposure to heat can also precipitate orthostatic hypotension and should be minimized. If dizziness, lightheadedness or palpitations occur, the patient should sit or lie down, and seek medical attention if symptoms are recurrent or bothersome.
Glaucoma, Narrow Angle
Major:
phenylephrine / tropicamide ophthalmic
The phenylephrine ophthalmic in phenylephrine / tropicamide ophthalmic has a major potential interaction with Glaucoma, Narrow Angle.
The use of nonspecific ophthalmic sympathomimetic agents is contraindicated in patients with narrow-angle glaucoma or anatomically narrow angles. These agents stimulate both alpha-1 and alpha-2 adrenergic receptors, thus topical administration can induce transient mydriasis. In patients with narrow angles, pupillary dilation can provoke an acute attack of angle-closure glaucoma. If possible, these agents (except for phenylephrine 2.5% or 10%) should also be avoided in patients with other forms of glaucoma, since mydriasis may occasionally increase intraocular pressure.
Glaucoma/Intraocular Hypertension
Major:
phenylephrine / tropicamide ophthalmic
The tropicamide ophthalmic in phenylephrine / tropicamide ophthalmic has a major potential interaction with Glaucoma/Intraocular Hypertension.
Anticholinergic agents are contraindicated in patients with primary glaucoma, a tendency toward glaucoma (narrow anterior chamber angle), or adhesions (synechiae) between the iris and lens, as well as for the elderly and others in whom undiagnosed glaucoma or excessive pressure in the eye may be present. Because anticholinergics cause mydriasis, they may exacerbate these conditions.
Hyperthyroidism
Moderate:
phenylephrine / tropicamide ophthalmic
The phenylephrine ophthalmic in phenylephrine / tropicamide ophthalmic has a moderate potential interaction with Hyperthyroidism.
Topically applied sympathomimetic agents are systemically absorbed, with the potential for producing clinically significant systemic effects, particularly during prolonged or indiscriminate use. 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, and coronary occlusion have been reported rarely during the use of ophthalmic and nasal sympathomimetic agents, but may be more likely if the corneal epithelium is damaged or if an excessive amount of drug is swallowed during nasal administration. Therapy with topical sympathomimetic agents should be administered cautiously in patients with corneal abrasion, sensitivity to sympathomimetic amines, hyperthyroidism, or underlying cardiovascular or cerebrovascular disorders, especially coronary insufficiency, cardiac arrhythmia, or hypertension. The potent ophthalmic formulations (e.g., phenylephrine 2.5% or 10%) that are used for diagnostic and pre-surgical purposes should not be used in such patients. For other preparations, it is important that the recommended dosages of the individual products not be exceeded.
Hypotension
Moderate:
terazosin
Terazosin has a moderate potential interaction with Hypotension.
Peripheral alpha 1- adrenergic receptor blocking agents (aka alpha 1- blockers) cause vasodilation and can produce marked hypotension, especially orthostatic hypotension with syncope or other postural symptoms such as dizziness, lightheadedness, and palpitations. Orthostatic effects are most common during initiation of therapy and often occur within 90 minutes after the first dose. However, they can also occur following a dosage increase or resumption of therapy after an interruption of more than a few days. Agents with alpha 1a specificity, such as tamsulosin, act primarily on the prostate but are not devoid of hypotensive effects. Therapy with peripheral alpha-1 blockers should be administered cautiously in patients with or predisposed to hypotensive or syncopal episodes. Caution is also advised in patients who are dehydrated (e.g., due to severe or prolonged diarrhea or vomiting), since they may be more sensitive to the hypotensive effect of the drugs. Therapy should be initiated with the lowest dosage possible and titrated gradually based on patient response and tolerance in accordance with the individual product package labeling. During initiation or reinstitution of therapy and following an increase in dosage, patients should be advised not to rise abruptly from a sitting or recumbent position and to avoid situations where injury could result if syncope occur. Concomitant use of alcohol, extensive periods of standing, prolonged or intense exercise, and exposure to heat can also precipitate orthostatic hypotension and should be minimized. If dizziness, lightheadedness or palpitations occur, the patient should sit or lie down, and seek medical attention if symptoms are recurrent or bothersome.
Liver Disease
Moderate:
terazosin
Terazosin has a moderate potential interaction with Liver Disease.
Little data exist concerning the pharmacokinetic disposition of terazosin in patients with liver disease. Terazosin is known to be metabolized by the liver, and both parent drug (approximately 30%) and metabolites are excreted in the bile and urine. Therapy with terazosin should be administered cautiously in patients with significantly impaired hepatic function, since drug accumulation may occur.
Prostate Tumor, Benign
Moderate:
phenylephrine / tropicamide ophthalmic
The phenylephrine ophthalmic in phenylephrine / tropicamide ophthalmic has a moderate potential interaction with Prostate Tumor, Benign.
Topically applied sympathomimetic agents are systemically absorbed, with the potential for producing clinically significant systemic effects, particularly during prolonged or indiscriminate use. In patients with prostate enlargement, urinary difficulty may develop or worsen due to smooth muscle contraction in the bladder neck via stimulation of alpha-1 adrenergic receptors. Therapy with topical sympathomimetic agents should be administered cautiously in patients with hypertrophy or neoplasm of the prostate. It is important that the recommended dosages of the individual products not be exceeded.
Syncope
Moderate:
terazosin
Terazosin has a moderate potential interaction with Syncope.
Peripheral alpha 1- adrenergic receptor blocking agents (aka alpha 1- blockers) cause vasodilation and can produce marked hypotension, especially orthostatic hypotension with syncope or other postural symptoms such as dizziness, lightheadedness, and palpitations. Orthostatic effects are most common during initiation of therapy and often occur within 90 minutes after the first dose. However, they can also occur following a dosage increase or resumption of therapy after an interruption of more than a few days. Agents with alpha 1a specificity, such as tamsulosin, act primarily on the prostate but are not devoid of hypotensive effects. Therapy with peripheral alpha-1 blockers should be administered cautiously in patients with or predisposed to hypotensive or syncopal episodes. Caution is also advised in patients who are dehydrated (e.g., due to severe or prolonged diarrhea or vomiting), since they may be more sensitive to the hypotensive effect of the drugs. Therapy should be initiated with the lowest dosage possible and titrated gradually based on patient response and tolerance in accordance with the individual product package labeling. During initiation or reinstitution of therapy and following an increase in dosage, patients should be advised not to rise abruptly from a sitting or recumbent position and to avoid situations where injury could result if syncope occur. Concomitant use of alcohol, extensive periods of standing, prolonged or intense exercise, and exposure to heat can also precipitate orthostatic hypotension and should be minimized. If dizziness, lightheadedness or palpitations occur, the patient should sit or lie down, and seek medical attention if symptoms are recurrent or bothersome.
Vomiting
Moderate:
terazosin
Terazosin has a moderate potential interaction with Vomiting.
Peripheral alpha 1- adrenergic receptor blocking agents (aka alpha 1- blockers) cause vasodilation and can produce marked hypotension, especially orthostatic hypotension with syncope or other postural symptoms such as dizziness, lightheadedness, and palpitations. Orthostatic effects are most common during initiation of therapy and often occur within 90 minutes after the first dose. However, they can also occur following a dosage increase or resumption of therapy after an interruption of more than a few days. Agents with alpha 1a specificity, such as tamsulosin, act primarily on the prostate but are not devoid of hypotensive effects. Therapy with peripheral alpha-1 blockers should be administered cautiously in patients with or predisposed to hypotensive or syncopal episodes. Caution is also advised in patients who are dehydrated (e.g., due to severe or prolonged diarrhea or vomiting), since they may be more sensitive to the hypotensive effect of the drugs. Therapy should be initiated with the lowest dosage possible and titrated gradually based on patient response and tolerance in accordance with the individual product package labeling. During initiation or reinstitution of therapy and following an increase in dosage, patients should be advised not to rise abruptly from a sitting or recumbent position and to avoid situations where injury could result if syncope occur. Concomitant use of alcohol, extensive periods of standing, prolonged or intense exercise, and exposure to heat can also precipitate orthostatic hypotension and should be minimized. If dizziness, lightheadedness or palpitations occur, the patient should sit or lie down, and seek medical attention if symptoms are recurrent or bothersome.
More resources
phenylephrine / tropicamide ophthalmic
A total of 291 drugs are known to interact with phenylephrine / tropicamide ophthalmic.
- Phenylephrine / tropicamide ophthalmic is in the drug class mydriatics.
- Phenylephrine / tropicamide ophthalmic is used to treat Pupillary Dilation.
terazosin
A total of 326 drugs are known to interact with terazosin.
- Terazosin is in the following drug classes: alpha blockers, antiadrenergic agents, peripherally acting.
- Terazosin is used to treat the following conditions:
Drug Interaction Classification
| Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
| Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
| Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. | |
| No interaction information available. |
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.