Can you take Phlemex with Trimethadione?
1 drug interaction and 12 additional warnings found for the following 2 drugs:
- Phlemex (dextromethorphan/guaifenesin)
- trimethadione
Drug interactions
Moderate drug interactions
Moderate:
dextromethorphan trimethadione
Applies to: Phlemex (dextromethorphan / guaifenesin) and trimethadione
Using dextromethorphan together with trimethadione may increase side effects such as dizziness, drowsiness, confusion, and difficulty concentrating. Some people, especially the elderly, may also experience impairment in thinking, judgment, and motor coordination. You should avoid or limit the use of alcohol while being treated with these medications. Also avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medications affect you. Talk to your doctor if you have any questions or concerns. 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:
dextromethorphan Food/Lifestyle
Applies to: Phlemex (dextromethorphan / guaifenesin)
Alcohol can increase the nervous system side effects of dextromethorphan such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with dextromethorphan. Do not use more than the recommended dose of dextromethorphan, and avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. Talk to your doctor or pharmacist if you have any questions or concerns.
Moderate:
trimethadione Food/Lifestyle
Applies to: trimethadione
Alcohol can increase the nervous system side effects of trimethadione such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with trimethadione. Do not use more than the recommended dose of trimethadione, and avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. Talk to your doctor or pharmacist if you have any questions or concerns.
Disease interactions
10 potential interactions Applies to: 10 conditions, including Depression, Psychosis, Myasthenia Gravis, Lupus Erythematosus, and Liver Disease.
Bone Marrow Depression/Low Blood Counts
Major:
trimethadione
Trimethadione has a major potential interaction with Bone Marrow Depression/Low Blood Counts.
Hematologic toxicities have been associated with the use of oxazolidinedione anticonvulsants. Fatal aplastic anemia, hypoplastic anemia, pancytopenia, agranulocytosis, leukopenia, neutropenia, thrombocytopenia, eosinophilia, retinal and petechial hemorrhages, vaginal bleeding, epistaxis, and bleeding gums have been reported. Therapy with oxazolidinediones should be administered cautiously, if at all, in patients with preexisting blood dyscrasias and/or bone marrow depression. Complete blood counts, including platelets, should be performed in all patients prior to initiating therapy and at monthly intervals, or as often as necessary, thereafter. A moderate degree of neutropenia, with or without a corresponding drop in the leukocyte count, is not uncommon and does not necessitate the discontinuation of therapy. However, more frequent monitoring is recommended if neutrophil count is less than 3000/mm3. Marked depression of blood counts (e.g., neutrophil count < 2500/mm3) is indication for withdrawal of oxazolidinedione therapy. Therapy with oxazolidinediones should ordinarily not be used in patients with severe blood dyscrasias.
Depression
Moderate:
trimethadione
Trimethadione has a moderate potential interaction with Depression.
Antiepileptic drugs (AEDs) have been associated with an increased risk of suicidal thoughts or behavior in patients taking these drugs for any indication. Pooled analyses of 199 placebo-controlled clinical studies involving the use of 11 different AEDs showed that patients receiving AEDs had approximately twice the risk of suicidal thinking or behavior compared to patients receiving placebo. AEDs should be administered cautiously in patients with depression or other psychiatric disorders; phentermine-topiramate should be avoided in patients with history of suicidal attempts or active suicidal ideation. The risk of suicidal thoughts and behavior should be carefully assessed against the risk of untreated illness, bearing in mind that epilepsy and many other conditions for which AEDs are prescribed are themselves associated with morbidity and mortality and an increased risk of suicidal thoughts and behavior. Patients, caregivers, and families should be alert to the emergence or worsening of signs and symptoms of depression, any unusual changes in mood or behavior, or the emergence of suicidal thoughts or behavior. If patients have symptoms of suicidal ideation or behavior, a dosage reduction or treatment discontinuation should be considered.
Dermatitis, Drug-Induced
Major:
trimethadione
Trimethadione has a major potential interaction with Dermatitis, Drug-Induced.
Potentially serious reactions to oxazolidinedione anticonvulsants such as exfoliative dermatitis and severe forms of erythema multiforme have been reported. Therapy with oxazolidinediones should be administered cautiously in patients with preexisting drug-induced dermatitis, since it may delay the recognition of a potential reaction to oxazolidinediones. Oxazolidinedione therapy should be withdrawn promptly at the first sign of a dermatologic adverse effect. Even a minor acneiform or morbilliform rash should be allowed to clear completely before treatment with these agents is resumed.
Liver Disease
Major:
trimethadione
Trimethadione has a major potential interaction with Liver Disease.
Hepatitis has been associated rarely with the use of oxazolidinedione anticonvulsants. In addition, these agents are primarily metabolized by the liver and may accumulate in the presence of liver disease. Therapy with oxazolidinediones should be administered cautiously, if at all, in patients with hepatic impairment. Liver function tests should be performed in all patients prior to initiating therapy and at monthly intervals, or as often as necessary, thereafter. The development of jaundice or other signs of liver dysfunction is indication for withdrawal of oxazolidinedione therapy.
Lupus Erythematosus
Moderate:
trimethadione
Trimethadione has a moderate potential interaction with Lupus Erythematosus.
Manifestations of systemic lupus erythematosus (SLE) have been associated with the use of oxazolidinedione anticonvulsants. Therapy with oxazolidinediones should be administered cautiously in patients with preexisting SLE. The development or exacerbation of SLE symptoms is indication for withdrawal of oxazolidinedione therapy.
Myasthenia Gravis
Moderate:
trimethadione
Trimethadione has a moderate potential interaction with Myasthenia Gravis.
A myasthenia gravis-like syndrome has been associated with the chronic use of oxazolidinedione anticonvulsants. Therapy with oxazolidinediones should be administered cautiously in patients with myasthenia gravis. The development or exacerbation of myasthenic symptoms is indication for withdrawal of oxazolidinedione therapy.
Optic Nerve Disorder
Major:
trimethadione
Trimethadione has a major potential interaction with Optic Nerve Disorder.
Hemeralopia has occurred with the use of oxazolidinedione anticonvulsants, probably as a result of the drugs' effects on the neural layers of the retina. The condition may be reversed by a reduction in dosage. Therapy with oxazolidinediones should be administered cautiously in patients with diseases of the retina or optic nerve. The development of scotomata or other significant ocular abnormality is indication for withdrawal of oxazolidinedione therapy.
Psychosis
Moderate:
trimethadione
Trimethadione has a moderate potential interaction with Psychosis.
Antiepileptic drugs (AEDs) have been associated with an increased risk of suicidal thoughts or behavior in patients taking these drugs for any indication. Pooled analyses of 199 placebo-controlled clinical studies involving the use of 11 different AEDs showed that patients receiving AEDs had approximately twice the risk of suicidal thinking or behavior compared to patients receiving placebo. AEDs should be administered cautiously in patients with depression or other psychiatric disorders; phentermine-topiramate should be avoided in patients with history of suicidal attempts or active suicidal ideation. The risk of suicidal thoughts and behavior should be carefully assessed against the risk of untreated illness, bearing in mind that epilepsy and many other conditions for which AEDs are prescribed are themselves associated with morbidity and mortality and an increased risk of suicidal thoughts and behavior. Patients, caregivers, and families should be alert to the emergence or worsening of signs and symptoms of depression, any unusual changes in mood or behavior, or the emergence of suicidal thoughts or behavior. If patients have symptoms of suicidal ideation or behavior, a dosage reduction or treatment discontinuation should be considered.
Renal Dysfunction
Major:
trimethadione
Trimethadione has a major potential interaction with Renal Dysfunction.
Fatal nephrosis has been associated with the use of oxazolidinedione anticonvulsants. In addition, the active metabolites of these agents are excreted slowly by the kidney and may accumulate in the presence of renal disease. Therapy with oxazolidinediones should be administered cautiously, if at all, in patients with impaired renal function. Urinalyses should be performed in all patients prior to initiating therapy and at monthly intervals, or as often as necessary, thereafter. The development of persistent or increasing albuminuria or any other significant renal abnormality is indication for withdrawal of oxazolidinedione therapy.
Retinal Disorders
Major:
trimethadione
Trimethadione has a major potential interaction with Retinal Disorders.
Hemeralopia has occurred with the use of oxazolidinedione anticonvulsants, probably as a result of the drugs' effects on the neural layers of the retina. The condition may be reversed by a reduction in dosage. Therapy with oxazolidinediones should be administered cautiously in patients with diseases of the retina or optic nerve. The development of scotomata or other significant ocular abnormality is indication for withdrawal of oxazolidinedione therapy.
More resources
Phlemex
A total of 375 drugs are known to interact with Phlemex.
- Phlemex is in the drug class upper respiratory combinations.
- Phlemex is used to treat the following conditions:
trimethadione
A total of 248 drugs are known to interact with trimethadione.
- Trimethadione is in the drug class oxazolidinedione anticonvulsants.
- Trimethadione is used to treat Seizures.
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
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