Antihistamines are a group of medications which can be used for the following conditions :
Some antihistamines, such as chlorpheniramine, dexchlorpheniramine, tripolidine, diphenhydramine, hydroxyzine and promethazine may cause drowsiness.
Other newer antihistamines, such as cetirizine, loratadine, fexofenadine, desloratadine and levocetirizine are less likely to cause drowsiness.
While some antihistamines may be available Over-the-Counter, other antihistamines require a doctor's prescription.
If you continue to experience symptoms for more than 2 weeks even with self-treatment or have any of the following symptoms:
Your condition may be too serious for self-treatment and you should consult a doctor.
The symptoms of a drug allergy includes one or more of the following:
If you experience, any of these symptoms, you should stop your medication and see your healthcare professionals immediately.
If you are taking a type of medication known as monoamine oxidase inhibitors (e.g. Rasagiline), contact your healthcare professional before taking antihistamines containing chlorpheniramine or brompheniramine as your blood pressure may drop dangerously low.
Taking this medication with alcohol may worsen the drowsy side effect. Avoid all alcohol while on this medication.
Many over- the-counter medications contains antihistamines, always check with your healthcare professionals before taking two over-the-counter medications at the same time to prevent overdosing.
If you forget to take a dose, take it as soon as you remember. Then take your next dose at the usual time. Do not take two doses to make up for the missed dose.
Pack this medication into a black trash bag and seal it tightly before throwing it into the rubbish chute or bin