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Doctor insights on: Ranitidine For Allergy

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Dr. John Chiu
2,628 Doctors shared insights

Allergies (Definition)

Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more


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Is Zantac (ranitidine) used for allergies?

Is Zantac (ranitidine) used for allergies?

Not exactly: Zantac (ranitidine) is an h2 (histamine) blocker that is typically used for ge (acid) reflux. However, it is commonly used to treat chronic hives in combination with traditional antihistamines. It is also used for additional treatment of severe (anaphylaxis) allergic reactions although first line treatment is Epinephrine and h1 antihistamine. It will not help allergic rhinitis. ...Read more

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How common is an allergy to zantac (ranitidine)?

How common is an allergy to zantac (ranitidine)?

Uncommon: Zantac (ranitidine) is an h2 receptor blocker (a different histamine receptor). A very common side effect of Zantac (ranitidine) is nausea, GI upset and diarrhea. If you are experiencing these, then it is not an allergy but rather a side effect of the medication. Although an allergy is very unusual for this medication, it is still a possibility. See an allergist. ...Read more

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Is Zantac (ranitidine) (histamine blocker) used for children for allergies.?

Is Zantac (ranitidine) (histamine blocker) used for children for allergies.?

Add-on for hives: Ranitidine (zantac), although it's a different kind of histamine blocker (h2 for acid vs h1 for allergies), has been shown to have some anti-allergy properties, especially when used with an h1 blocker like Benadryl (diphenhydramine) for hives. There was actually one study that showed benefit in nasal allergies, but I don't know anyone that prescribes it for that purpose. ...Read more

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What is cows milk protein allergy? What foods to avoid? What's best baby formula to use he also has silent reflux on ranitidine and domperidone

What is cows milk protein allergy? What foods to avoid? What's best baby formula to use he also has silent reflux on ranitidine and domperidone

Any cow milk product: Cow's milk is present in most cheeses, yoghurt, cream, butter and hence virtually all dairy. You must read the labels to know for sure. Soy based formulas are the most common alternatives. Your pediatrician should help you select a formula that is milk-free. It may be possible later in childhood to introduce sheep and goat milk products but wait for your pediatrician to give the ok. ...Read more

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My 13 week old is on 0.6mls ranitidine for reflux now my doctor think he has a cows milk allergy. He is fussy, won't nap and doesn't sleep through night?

My 13 week old is on 0.6mls ranitidine for reflux now my doctor think he has a cows milk allergy. He is fussy, won't nap and doesn't sleep through night?

Other suggestions: I agree that your son may have a cows milk allergy or lack of tolerance to milk. If there is a history of allergic disease in the family, a rash called eczema then it is more likely to be an allergic reaction. If he continues to spit up while on the medication, a dose adjustment for his weight may be needed. I would also suggest that he feed at around a 40 degree angle. ...Read more

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I had an allergy to doxycycline 4 weeks ago I can't take benedryl and I took prednisone for 12 days and I still itch, I have been taking ranitidine?

I had an allergy to doxycycline 4 weeks ago I can't take benedryl and I took prednisone for 12 days and I still itch, I have been taking ranitidine?

Cause?: I doubt that the allergy to doxycycline can linger on this long and thus your itching must be from something else. In the absence of skin rash, dry skin is the most common cause for itching. Have you tried applying a moisturizer on your body 2x daily with one <3 mins after bathing? ...Read more

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Will azithromycin cause lips to swell if mixed with Imodium, Prilosec or Zantac (ranitidine)? You can also view my other medication to help. Never had med allergy B4

Will azithromycin cause lips to swell if mixed with Imodium, Prilosec or Zantac (ranitidine)? You can also view my other medication to help. Never had med allergy B4

ALLERGIC REACTION: You may be having an allergic reaction to the Azithromycin. You need to be examined promptly and have labs checked (Especially Eosinophil level) I normally would treat with a prednisone taper over 8 days. If symptoms worsen and you have difficulty breathing go to nearest ER. ...Read more

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Can I give my 15 month old peptobismol? She keeps throwing up with no signs of fever or illness. We have checked food allergies, ans GERD (taking zantac (ranitidine) 2x daily). I cannot figure out what's wrong :- (

Can I give my 15 month old peptobismol? She keeps throwing up with no signs of fever or illness. We have checked food allergies, ans GERD (taking zantac (ranitidine) 2x daily). I cannot figure out what's wrong :- (

I wouldn't: Pepto has salycilates which we don't give tom kids under 16 because of an association with liver failure/death (Reye syndrome).Wet burps that do not result in problems with hydration often decrease with age as the reflux improves. If the kid is growing well. I would leave it alone. ...Read more

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Is it possible that Zantac, being a histamine blocker, could cause higher histamine production when coming off of it, resulting in development of allergies? For example consuming diet soda can result in insulin spikes in some cases, possibly leading to di

Is it possible that Zantac, being a histamine blocker, could cause higher histamine production when coming off of it, resulting in development of allergies? For example consuming diet soda can result in insulin spikes in some cases, possibly leading to di

No: Zantac (ranitidine) is a histamine 2 receptor reverse agonist and would not significantly affect histamine production. When withdrawn. There is a theoretical possibility that Zantac (ranitidine) itself may lead to more histamine release by blocking the histamine 2 receptor (which acts as a feedback switch) but this has not been clinically a significant issue. ...Read more

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Can I take prednisone, Zantac and Benadryl (diphenhydramine) for allergies?

Can I take prednisone, Zantac and Benadryl (diphenhydramine) for allergies?

Yes, but: It is bit much, especially the prednisone. And the Benadryl (diphenhydramine) makes most people sleepy. I would recommend a non-sedating antihistamine, such as loratadine, cetirizine, or fexofenadine. ...Read more

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30 year-old woman with a 4-year history of numbness in the upper body, and arms and legs, with undiagnostic imaging studies, but carries diagnos.....?

30 year-old woman with a 4-year history of numbness in the upper body, and arms and legs, with undiagnostic imaging studies, but carries diagnos.....?

Stress related?!: At age 30 with so many normal tests and diagnoses like fibromyalgia and trigeminal nauralgia (highly unusual for that age except in MS, ruled out by the normal MRIs) non organic and stress related problems come to mind Don't forget the symptoms are REAL in those cases too! ...Read more

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Is 450mg of Zantac (ranitidine) bad?

Probably not: It is higher than the recommended maximum daily dose of 300 mg but it should not present any major issues. ...Read more

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How much ranitidine should my 19week 13lb 5 baby be taking?

How much ranitidine should my 19week 13lb 5 baby be taking?

Typical dosing: You should review your medications and their dosing with your pediatrician. No infant should be on this medication without the doctor's knowledge. Typical infant dosing for ranitidine is 5-10 mg/kg/day --> 1-2 mL (15-30 mg) twice daily would typically be appropriate for a 6 kg (13 lb 5 oz) infant. ...Read more

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What is the use of Ranitidine in ICU?

What is the use of Ranitidine in ICU?

Ranitidine: Ranitidine is in a group of drugs called histamine-2 blockers. Ranitidine works by reducing the amount of acid your stomach produces. In the ICU setting, there may be other medications that could irritate your stomach lining, so deceasing acid with ranitidine may be prescribed prophylactically. Hope this helps. ...Read more

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Hi, is it ok to take Gaviscon while I'm taking ranitidine.?

Hi, is it ok to take Gaviscon while I'm taking ranitidine.?

Probably not: It is common to use a drug like ranitidine with an antacid like gaviscon. As with most drugs, antacids - especially those with aluminum- can bind certain other drug sand reduce absorption don;t know if you're taking any other meds so I would separate the Gaviscon and other meds by at least 1-2 hours. ...Read more

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Is Zantac (ranitidine) an antihistamine?

Yes: There are now 4 types of histamine receptors. Zantac (ranitidine) acts on the h2 receptor resulting in blocking stomach acid thereby treating heartburn. Allergies are treated with h1 blocking type medications including claritin, (loratadine) zyrtec and allegra. Some medications have both actions to block both h1 and h2 receptor. For anaphylaxis, zantac can be added for it's effect on blood vessels. ...Read more

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Ok to take ranitidine and diphenhydramine?

Yes: There is no interaction between these tow meds so you can take them in combination without interaction complications. However, Diphenhydramine can make you quite drowsy, so be careful if driving or using machinery (i fall asleep just reading the bottle!). ...Read more

Dr. Sanjay Talati
649 Doctors shared insights

Ranitidine (Definition)

Treats and prevents heartburn with acid indigestion. Also treats stomach ulcers, gastroesophageal reflux disease (gerd), and conditions that cause your stomach to make too much acid (such as zollinger-ellison syndrome). This medicine ...Read more


Dr. Abraham Jaskiel
560 Doctors shared insights

Zantac (Definition)

Zantac is a H2 receptor blocker which is a kind of ...Read more