Doctor insights on:
Does Champix Interact With Antihistamines
I had grapefruit, then took 10mg of cetirizine about an hour or so later. I had no idea grapefruit could interact with antihistamines. Am I in danger?
No.: There is a protein in grapefruit that can inhibit one of the systems in the body that metabolize drugs. So, this may increase the potency of certain family of drugs, by decreasing the breaking down of the drug in the body. The two antihistamines that were in this category have been removed from the market, so there is probably a small, but clinically insignificant, effect. Don't worry.See 3 more doctor answers
Drug interactions.: Benadryl (diphenhydramine) can be sedating (typically) or stimulating (unusual). When a reaction occurs opposite to what is typically experienced, it is called a paradoxical reaction. A pharmacist can run a drug interaction screen for you and this is why it is wise to get all of your medications from a single source. Decongestants are stimulants and often used in combination with Benadryl (diphenhydramine) and could be a bad mix.See 1 more doctor answer
If Benadryl's plasma clearance is about 9 hours x 5, how long would it remain active to affect the brain and interact with other medications?
At ER gave me shot of Benadryl (diphenhydramine) inmy arm will this interact with any of my medication I'm on clonazepam 3mg inderal 40mg twice a day and remeron 45 mg?
No: No it will not except to possibly increase sedation for a short time.
I gave expired antihistamine syrup to my 30 months old son incidentally...Is it dangerous? What s the side effect on him?
Expired drugs: There should be no side effects as expiration is usually based on loss of drug effectiveness. Drug companies err on the side of shortening times to expiration. Actually many drugs are effective long after expiration dates. Expired drugs are commonly used effectively by volunteer organizations when no other drugs are available. Relax!See 1 more doctor answer
I have sever hives which continued over 3 weeks so far. What might be the cause (s)? Would telfast or aerius antihistamine meds. Work? Which one better
Hives.: Books are written discussing the many causes of hives. The most common cause would be a reaction to a new medication or food. It is often very hard to find the precise cause without doing an elimination diet and or stopping the inciting medication. Hives can also be caused by viruses, airborne allergies, cold, heat, friction and internal disease.See 1 more doctor answer
Varenicline/Quetiap: Champix (varenicline) has not been shown to have any clinically significant interaction with seroquel (quetiapine). However, there have been reported cases of exacerbated manic episodes in bipolar patients taking varenicline. Caution is therefore advised. Be sure the bipolar condition is under control before commencing varenicline therapy & even then, under close medical supervision. Good luck!See 1 more doctor answer
Yes: It tells me that this is a risky behavior and likely a suicidal attempt. Call the psychiatrist or the suicide hotline.
The newer ones: Antihistamines can cause sedation by entering the brain's tissue and binding to h1 receptors. (called "crossing the blood brain barrier".) that effect is desirable if you are taking an antihistamine for sleep (e.g. Benadryl). The newer antihistamines don't cross the blood brain barrier as much. These include (least to most sedate) fexofenadine (allegra), Cetirizine (zyrtec), loratidine (claritin).See 2 more doctor answers
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