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While it can be part of a balanced and nutritious diet, grapefruit can have serious consequences when taken with certain medications. Cu"...
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- Clinician Information:
Seldane Patient Information including If I Miss a Dose
In this Article
- What is terfenadine (Seldane)?
- What are the possible side effects of terfenadine (Seldane)?
- What is the most important information I should know about terfenadine (Seldane)?
- Who should not take terfenadine (Seldane)?
- How should I take terfenadine (Seldane)?
- What happens if I miss a dose (Seldane)?
- What happens if I overdose (Seldane)?
- What should I avoid while taking terfenadine (Seldane)?
- What other drugs will affect terfenadine (Seldane)?
- Where can I get more information?
What happens if I miss a dose (Seldane)?
Take the missed dose as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and take only your next regularly scheduled dose. Do not take a double dose of this medication.
What happens if I overdose (Seldane)?
Seek emergency medical attention.
Symptoms of a terfenadine overdose include headache, drowsiness, irregular heartbeat, nausea, and vomiting.
What should I avoid while taking terfenadine (Seldane)?
Use caution when driving, operating machinery, or performing other hazardous activities. Terfenadine may cause dizziness or drowsiness. If you experience dizziness or drowsiness, avoid these activities.
Use alcohol cautiously. Alcohol may increase drowsiness and dizziness while you are taking terfenadine.
What other drugs will affect terfenadine (Seldane)?
Never take terfenadine with any of the following medications:
- antifungal drugs such as ketoconazole (Nizoral) and itraconazole (Sporanox);
- antibiotics such as erythromycin (E.E.S., E-Mycin, Ery-Tab, others), clarithromycin (Biaxin), and azithromycin (Zithromax); or
- ulcer drugs such as cimetidine (Tagamet, Tagamet HB).
A dangerous side effect involving irregular heartbeats could occur if you take terfenadine with any of the medicines listed above.
Before taking this medication, tell your doctor if you are taking any of the following medicines:
- a beta-blocker (heart medication) such as propranolol (Inderal) or metoprolol (Lopressor);
- a monoamine oxidase inhibitor (MAOI) antidepressant such as isocarboxazid (Marplan), phenelzine (Nardil), or tranylcypromine (Parnate);
- a tricyclic antidepressant such as amitriptyline (Elavil), doxepin (Sinequan), or nortriptyline (Pamelor); or
- caffeine, amphetamines, decongestants, or diet pills.
Drugs other than those listed here may also interact with terfenadine. Talk to your doctor and pharmacist before taking any prescription or over-the-counter medicines.
Where can I get more information?
Your pharmacist has additional information about terfenadine written for health professionals that you may read.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
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Additional Seldane Information
- Seldane Drug Interactions Center: terfenadine oral
- Seldane Side Effects Center
- Seldane FDA Approved Prescribing Information including Dosage
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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