Precautions
Before taking this drug, tell your doctor or pharmacist:
- If you are allergic to it; or if you have any other allergies.
- Your medical history, especially of:
- Breathing Problems (e.g., Asthma, Emphysema)
- Diabetes
- A Certain Eye Problem (Glaucoma)
- Heart Problems
- High Blood Pressure
- Kidney Problems
- Liver Disease
- Seizures
- Stomach or Intestinal Problems (e.g., Ulcers, Blockage)
- Overactive Thyroid (Hyperthyroidism)
- Urination Problems
This drug may cause dizziness, drowsiness or blurred vision. Avoid activities requiring alertness or clear vision such as driving until you are sure you can perform such activities safely. Limit the use of alcohol and certain other medications that cause drowsiness.
This medicine may contain Aspartame. Consult your doctor or pharmacist regarding the safe use of this medicine if you have phenylketonuria (PKU) or any other condition that requires you to restrict your intake of Aspartame (or phenylalanine).
Children may be more sensitive to the effects of antihistamines. In young children, this medication may cause agitation/excitement instead of drowsiness.
Interactions
Drug interactions may either lessen the effect of this drug or heighten the risk for severe side effects. It’s important to inform your doctor all the medication including prescription and non-prescription and herbal medicines you are taking or going to take.
Possible interactions with this drug are:
- MAO inhibitors like Isocarboxazid, Methylene Blue, Moclobemide, Phenelzine, Procarbazine, Rasagiline, Selegiline, or Tranylcypromine. These medications may cause serious interaction.
- Antihistamines applied to the skin (such as Diphenhydramine Cream, Ointment, Spray)
- Antispasmodics (e.g., Atropine, Belladonna Alkaloids)
- Beta Blockers (e.g., Metoprolol, Atenolol)
- Drugs for Parkinson’s Disease (e.g., Anticholinergics such as Benztropine, Trihexyphenidyl)
- Guanethidine
- Certain Inhaled Anesthetics (e.g., Halothane)
- Methyldopa
- Reserpine
- Scopolamine
- Tricyclic Antidepressants (e.g., Amitriptyline, Desipramine)