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Can you take Scot-Tussin Allergy with Vemurafenib?

1 drug interaction and 26 additional warnings found for the following 2 drugs:

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Drug interactions

Moderate drug interactions

Moderate:

diphenhydrAMINE vemurafenib

Applies to: Scot-Tussin Allergy (diphenhydramine) and vemurafenib

Vemurafenib may increase the blood levels and effects of diphenhydrAMINE. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. Contact your doctor if your condition changes or you experience increased side effects. 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:

diphenhydrAMINE Alcohol (Ethanol)

Applies to: Scot-Tussin Allergy (diphenhydramine)

Ask your doctor before using diphenhydrAMINE together with ethanol (alcohol). Use alcohol cautiously. Alcohol may increase drowsiness and dizziness while you are taking diphenhydrAMINE. You should be warned not to exceed recommended dosages and to avoid activities requiring mental alertness. If your doctor prescribes these medications together, you may need a dose adjustment to safely take this combination. 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

25 potential interactions Applies to: 19 conditions, including Depression, Asthma, COPD, Arrhythmia, and Hypotension.

Arrhythmia

Moderate:

vemurafenib

Vemurafenib has a moderate potential interaction with Arrhythmia.

Vemurafenib can cause dose dependent QT prolongation which may lead to an increased risk for ventricular arrhythmias, including Torsade de Pointes. It is recommended not to start treatment in patients with uncorrectable electrolyte abnormalities, QTc > 500 ms, or long QT syndrome, or in patients who are taking medicinal products known to prolong the QT interval. Evaluate patients prior to and following treatment initiation or after dose modification for QTc prolongation, evaluate ECG and electrolytes (including potassium, magnesium, and calcium) periodically, and thereafter as clinically indicated. Vemurafenib should be withhold in patients who develop QTc > 500 ms. Upon recovery to QTc <= 500 ms, restart at a reduced dose and it should be permanently discontinued if the QTc interval remains > 500 ms and increased > 60 ms from pre-treatment values after controlling cardiac risk factors for QT prolongation (e.g., electrolyte abnormalities, congestive heart failure, and bradyarrhythmias).

Asthma

Moderate:

Scot-Tussin Allergy

The diphenhydrAMINE in Scot-Tussin Allergy has a moderate potential interaction with Asthma.

Oral anxiolytic, sedative, and hypnotic agents may cause respiratory depression and apnea when given in high dosages or following acute overdose. However, some patients may be susceptible at commonly used dosages, including the elderly, debilitated or severely ill patients, those receiving other CNS depressants, and those with limited ventilatory reserve, chronic pulmonary insufficiency or other respiratory disorders. Therapy with anxiolytic, sedative, and hypnotic agents should be administered cautiously in these patients. Appropriate monitoring and individualization of dosage are recommended.

Moderate:

Scot-Tussin Allergy

The diphenhydrAMINE in Scot-Tussin Allergy has a moderate potential interaction with Asthma.

It has been suggested that the anticholinergic effect of antihistamines may reduce the volume and cause thickening of bronchial secretions, resulting in obstruction of respiratory tract. Some manufacturers and clinicians recommend that therapy with antihistamines be administered cautiously in patients with asthma or chronic obstructive pulmonary disease.

Cardiovascular Conditions and Disorders

Moderate:

Scot-Tussin Allergy

The diphenhydrAMINE in Scot-Tussin Allergy has a moderate potential interaction with Cardiovascular Conditions and Disorders.

Antihistamines may infrequently cause cardiovascular adverse effects related to their anticholinergic and local anesthetic (quinidine-like) activities. Tachycardia, palpitation, ECG changes, arrhythmias, hypotension, and hypertension have been reported. Although these effects are uncommon and usually limited to overdosage situations, the manufacturers and some clinicians recommend that therapy with antihistamines be administered cautiously in patients with cardiovascular disease, hypertension, and/or hyperthyroidism.

COPD

Moderate:

Scot-Tussin Allergy

The diphenhydrAMINE in Scot-Tussin Allergy has a moderate potential interaction with COPD.

It has been suggested that the anticholinergic effect of antihistamines may reduce the volume and cause thickening of bronchial secretions, resulting in obstruction of respiratory tract. Some manufacturers and clinicians recommend that therapy with antihistamines be administered cautiously in patients with asthma or chronic obstructive pulmonary disease.

Depression

Major:

Scot-Tussin Allergy

The diphenhydrAMINE in Scot-Tussin Allergy has a major potential interaction with Depression.

A variety of abnormal thinking and behavior changes have been reported to occur in association with the use of most anxiolytics, sedatives and hypnotics. Some of these changes include decreased inhibition, aggressiveness, agitation, and hallucinations. These drugs can cause or exacerbate mental depression and cause suicidal behavior and ideation. Therapy with these drugs should be administered cautiously in patients with a history of depression or other psychiatric disorders. Patients should be monitored for any changes in mood or behavior. It may be prudent to refrain from dispensing large quantities of medication to these patients.

Dermatitis, Drug-Induced

Moderate:

vemurafenib

Vemurafenib has a moderate potential interaction with Dermatitis, Drug-Induced.

Severe dermatologic reactions, including Stevens-Johnson syndrome, toxic epidermal necrolysis, and mild to severe photosensitivity can occur in patients treated with vemurafenib. Consider dose modifications for intolerable >= Grade 2 photosensitivity. It is recommended to advise patients to avoid sun exposure, wear protective clothing and use a broad-spectrum UVA/UVB sunscreen and a suitable lip balm when outdoors while on vemurafenib treatment. Permanently discontinue vemurafenib in patients who experience a severe dermatologic reaction.

Electrolyte Abnormalities

Moderate:

vemurafenib

Vemurafenib has a moderate potential interaction with Electrolyte Abnormalities.

Vemurafenib can cause dose dependent QT prolongation which may lead to an increased risk for ventricular arrhythmias, including Torsade de Pointes. It is recommended not to start treatment in patients with uncorrectable electrolyte abnormalities, QTc > 500 ms, or long QT syndrome, or in patients who are taking medicinal products known to prolong the QT interval. Evaluate patients prior to and following treatment initiation or after dose modification for QTc prolongation, evaluate ECG and electrolytes (including potassium, magnesium, and calcium) periodically, and thereafter as clinically indicated. Vemurafenib should be withhold in patients who develop QTc > 500 ms. Upon recovery to QTc <= 500 ms, restart at a reduced dose and it should be permanently discontinued if the QTc interval remains > 500 ms and increased > 60 ms from pre-treatment values after controlling cardiac risk factors for QT prolongation (e.g., electrolyte abnormalities, congestive heart failure, and bradyarrhythmias).

Gastrointestinal Obstruction

Moderate:

Scot-Tussin Allergy

The diphenhydrAMINE in Scot-Tussin Allergy has a moderate potential interaction with Gastrointestinal Obstruction.

Antihistamines often have anticholinergic activity, to which elderly patients are particularly sensitive. Therapy with antihistamines should be administered cautiously, if at all, in patients with preexisting conditions that are likely to be exacerbated by anticholinergic activity, such as urinary retention or obstruction; angle-closure glaucoma, untreated intraocular hypertension, or uncontrolled primary open-angle glaucoma; and gastrointestinal obstructive disorders. Conventional, first-generation antihistamines such as the ethanolamines (bromodiphenhydramine, carbinoxamine, clemastine, dimenhydrinate, diphenhydramine, doxylamine, phenyltoloxamine) tend to exhibit substantial anticholinergic effects. In contrast, the newer, relatively nonsedating antihistamines (e.g., cetirizine, fexofenadine, loratadine) reportedly have low to minimal anticholinergic activity at normally recommended dosages and may be appropriate alternatives.

Glaucoma/Intraocular Hypertension

Moderate:

Scot-Tussin Allergy

The diphenhydrAMINE in Scot-Tussin Allergy has a moderate potential interaction with Glaucoma/Intraocular Hypertension.

Antihistamines often have anticholinergic activity, to which elderly patients are particularly sensitive. Therapy with antihistamines should be administered cautiously, if at all, in patients with preexisting conditions that are likely to be exacerbated by anticholinergic activity, such as urinary retention or obstruction; angle-closure glaucoma, untreated intraocular hypertension, or uncontrolled primary open-angle glaucoma; and gastrointestinal obstructive disorders. Conventional, first-generation antihistamines such as the ethanolamines (bromodiphenhydramine, carbinoxamine, clemastine, dimenhydrinate, diphenhydramine, doxylamine, phenyltoloxamine) tend to exhibit substantial anticholinergic effects. In contrast, the newer, relatively nonsedating antihistamines (e.g., cetirizine, fexofenadine, loratadine) reportedly have low to minimal anticholinergic activity at normally recommended dosages and may be appropriate alternatives.

Moderate:

Scot-Tussin Allergy

The diphenhydrAMINE in Scot-Tussin Allergy has a moderate potential interaction with Glaucoma/Intraocular Hypertension.

Some hypnotic drugs can have an anticholinergic effect and should be used with caution in patients with glaucoma, and trouble urinating due to retention or enlarged prostate.

History, Skin Cancer

Moderate:

vemurafenib

Vemurafenib has a moderate potential interaction with History, Skin Cancer.

Cutaneous squamous cell carcinoma, keratoacanthoma, and melanoma occurred at a higher incidence in patients receiving vemurafenib. Potential risk factors associated included age (> 65 years), prior skin cancer, and chronic sun exposure. It is recommended to perform dermatologic evaluations prior to initiation of therapy and periodically thereafter as clinically indicated. Consider dermatologic monitoring for 6 months following discontinuation of vemurafenib.

Hyperthyroidism

Moderate:

Scot-Tussin Allergy

The diphenhydrAMINE in Scot-Tussin Allergy has a moderate potential interaction with Hyperthyroidism.

Antihistamines may infrequently cause cardiovascular adverse effects related to their anticholinergic and local anesthetic (quinidine-like) activities. Tachycardia, palpitation, ECG changes, arrhythmias, hypotension, and hypertension have been reported. Although these effects are uncommon and usually limited to overdosage situations, the manufacturers and some clinicians recommend that therapy with antihistamines be administered cautiously in patients with cardiovascular disease, hypertension, and/or hyperthyroidism.

Hypotension

Moderate:

Scot-Tussin Allergy

The diphenhydrAMINE in Scot-Tussin Allergy has a moderate potential interaction with Hypotension.

Antihistamines may infrequently cause cardiovascular adverse effects related to their anticholinergic and local anesthetic (quinidine-like) activities. Tachycardia, palpitation, ECG changes, arrhythmias, hypotension, and hypertension have been reported. Although these effects are uncommon and usually limited to overdosage situations, the manufacturers and some clinicians recommend that therapy with antihistamines be administered cautiously in patients with cardiovascular disease, hypertension, and/or hyperthyroidism.

Interstitial Lung Disease

Moderate:

vemurafenib

Vemurafenib has a moderate potential interaction with Interstitial Lung Disease.

The use of certain multikinase inhibitors has been associated with pulmonary toxicity. Serious cases of interstitial lung disease (ILD), including fatal cases and interstitial pneumonitis or pulmonary fibrosis have been reported. Caution is recommended when using these agents in patients with a history of interstitial pneumonitis or pulmonary fibrosis or those patients presenting with acute onset of new or progressive unexplained pulmonary symptoms such as dyspnea, cough, and fever pending diagnostic evaluation. If ILD is confirmed, these agents should be permanently discontinued and appropriate measures should be instituted. Treatment should be immediately withheld in patients diagnosed with ILD/pneumonitis and permanently discontinued if no other potential causes of ILD/pneumonitis have been identified.

Liver Disease

Moderate:

Scot-Tussin Allergy

The diphenhydrAMINE in Scot-Tussin Allergy has a moderate potential interaction with Liver Disease.

In general, anxiolytics, sedatives and hypnotics are extensively metabolized by the liver. Their plasma clearance may be decreased and their half-life prolonged in patients with impaired hepatic function. Therapy with these drugs should be administered cautiously in patients with liver disease (some are not recommended in severe liver impairment), and the dosage should be adjusted accordingly. Laboratory testing is recommended prior and during treatment.

Moderate:

Scot-Tussin Allergy

The diphenhydrAMINE in Scot-Tussin Allergy has a moderate potential interaction with Liver Disease.

Limited pharmacokinetic data are available for the older, first-generation antihistamines. Many appear to be primarily metabolized by the liver, and both parent drugs and metabolites are excreted in the urine. Patients with renal and/or liver disease may be at greater risk for adverse effects from antihistamines due to drug and metabolite accumulation. Therapy with antihistamines should be administered cautiously in such patients. Lower initial dosages may be appropriate.

Moderate:

vemurafenib

Vemurafenib has a moderate potential interaction with Liver Disease.

Liver injury leading to functional hepatic impairment, including coagulopathy or other organ dysfunction may occur with the use of vemurafenib. Based on a population pharmacokinetic analysis to evaluate the effect of hepatic impairment, no dose adjustment is recommended for patients with mild and moderate hepatic impairment. The appropriate dose of vemurafenib has not been established in patients with severe hepatic impairment. It is recommended to monitor transaminases, alkaline phosphatase, and bilirubin before initiation of treatment and monthly during treatment, or as clinically indicated; and to manage laboratory abnormalities with dose reduction, treatment interruption, or treatment discontinuation as appropriate.

Pulmonary Impairment

Moderate:

vemurafenib

Vemurafenib has a moderate potential interaction with Pulmonary Impairment.

The use of certain multikinase inhibitors has been associated with pulmonary toxicity. Serious cases of interstitial lung disease (ILD), including fatal cases and interstitial pneumonitis or pulmonary fibrosis have been reported. Caution is recommended when using these agents in patients with a history of interstitial pneumonitis or pulmonary fibrosis or those patients presenting with acute onset of new or progressive unexplained pulmonary symptoms such as dyspnea, cough, and fever pending diagnostic evaluation. If ILD is confirmed, these agents should be permanently discontinued and appropriate measures should be instituted. Treatment should be immediately withheld in patients diagnosed with ILD/pneumonitis and permanently discontinued if no other potential causes of ILD/pneumonitis have been identified.

Renal Dysfunction

Moderate:

Scot-Tussin Allergy

The diphenhydrAMINE in Scot-Tussin Allergy has a moderate potential interaction with Renal Dysfunction.

Limited pharmacokinetic data are available for the older, first-generation antihistamines. Many appear to be primarily metabolized by the liver, and both parent drugs and metabolites are excreted in the urine. Patients with renal and/or liver disease may be at greater risk for adverse effects from antihistamines due to drug and metabolite accumulation. Therapy with antihistamines should be administered cautiously in such patients. Lower initial dosages may be appropriate.

Moderate:

vemurafenib

Vemurafenib has a moderate potential interaction with Renal Dysfunction.

Renal failure, including acute interstitial nephritis and acute tubular necrosis may occur with the use of vemurafenib. Based on a population pharmacokinetic analysis, no dose adjustment is recommended for patients with mild and moderate renal impairment. The appropriate dose of vemurafenib has not been established in patients with severe renal impairment. It is recommended to measure serum creatinine before initiation of therapy and periodically during treatment.

Skin Cancer

Moderate:

vemurafenib

Vemurafenib has a moderate potential interaction with Skin Cancer.

Cutaneous squamous cell carcinoma, keratoacanthoma, and melanoma occurred at a higher incidence in patients receiving vemurafenib. Potential risk factors associated included age (> 65 years), prior skin cancer, and chronic sun exposure. It is recommended to perform dermatologic evaluations prior to initiation of therapy and periodically thereafter as clinically indicated. Consider dermatologic monitoring for 6 months following discontinuation of vemurafenib.

Urinary Retention

Moderate:

Scot-Tussin Allergy

The diphenhydrAMINE in Scot-Tussin Allergy has a moderate potential interaction with Urinary Retention.

Some hypnotic drugs can have an anticholinergic effect and should be used with caution in patients with glaucoma, and trouble urinating due to retention or enlarged prostate.

Moderate:

Scot-Tussin Allergy

The diphenhydrAMINE in Scot-Tussin Allergy has a moderate potential interaction with Urinary Retention.

Antihistamines often have anticholinergic activity, to which elderly patients are particularly sensitive. Therapy with antihistamines should be administered cautiously, if at all, in patients with preexisting conditions that are likely to be exacerbated by anticholinergic activity, such as urinary retention or obstruction; angle-closure glaucoma, untreated intraocular hypertension, or uncontrolled primary open-angle glaucoma; and gastrointestinal obstructive disorders. Conventional, first-generation antihistamines such as the ethanolamines (bromodiphenhydramine, carbinoxamine, clemastine, dimenhydrinate, diphenhydramine, doxylamine, phenyltoloxamine) tend to exhibit substantial anticholinergic effects. In contrast, the newer, relatively nonsedating antihistamines (e.g., cetirizine, fexofenadine, loratadine) reportedly have low to minimal anticholinergic activity at normally recommended dosages and may be appropriate alternatives.

Visual Defect/Disturbance

Moderate:

vemurafenib

Vemurafenib has a moderate potential interaction with Visual Defect/Disturbance.

Uveitis, blurry vision, and photophobia can occur in patients treated with vemurafenib. Monitor patients for signs and symptoms of uveitis. Care must be exercised when using this agent in patients with ophthalmological complications.

More resources

Scot-Tussin Allergy

A total of 493 drugs are known to interact with Scot-Tussin Allergy.

vemurafenib

A total of 644 drugs are known to interact with vemurafenib.

Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor 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.
Unknown No interaction information available.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.