Drug Interaction Report
3 potential interactions and/or warnings found for the following 2 drugs:
- astemizole
- efavirenz
Interactions between your drugs
astemizole efavirenz
Applies to: astemizole, efavirenz
Astemizole and terfenadine are no longer on the market in the US. Do not take astemizole or terfenadine with any other medication.
Drug and food interactions
astemizole food
Applies to: astemizole
Astemizole is no longer on the market in the US. Do not take astemizole with any other medication, food, or beverage.
efavirenz food
Applies to: efavirenz
Taking efavirenz with food increases the amount of medicine in your body, which may increase the frequency of side effects. You should take efavirenz once a day on an empty stomach, preferably at bedtime. Taking it at bedtime may make some side effects such as dizziness, trouble sleeping, drowsiness, trouble concentrating, and/or unusual dreams less bothersome. However, these symptoms may be more severe if efavirenz is used with alcohol or mood-altering (street) drugs. You should avoid driving or operating hazardous machinery until you know how the medication affects you. 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.
Therapeutic duplication warnings
No duplication warnings were found for your selected drugs.
Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.
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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. |
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Further information
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