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Contact your doctor if you experience these side effects and they are severe or bothersome. Your pharmacist may be able to advise you on managing side effects. Although most of these side effects listed below don't happen very often, they could lead to serious problems if you do not seek medical attention. Stop taking the medication and seek immediate medical attention if any of the following occur:. Some people may experience side effects other than those listed. Check with your doctor if you notice any symptom that worries you while you are taking this medication.

Before you begin using a medication, be sure to inform your doctor of any medical conditions or allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should use this medication.

Kidney function: Kidney disease or reduced kidney function may cause this medication to build up in the body, causing side effects. If you have reduced kidney function or kidney disease, discuss with your doctor how this medication may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.

Pneumonia: People with lung disease, a weak immune system, or diabetes may be at an increased risk of developing pneumonia while taking ranitidine. If you have any of these conditions, discuss with your doctor how this medication may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.

Porphyria: Ranitidine may cause attacks of a condition called acute porphyria a disorder that affects the production of heme in the body.

People with a history of acute porphyria should not take ranitidine. Stomach cancer: Using medications such as ranitidine may prevent symptoms of stomach cancer from being noticed. If you have recurrent vomiting, difficulty swallowing, blood in the stool, significant unintentional weight loss, fatigue anemia , or are coughing up blood, check with your doctor right away.

If you have heartburn that worsens or returns after using this medication continuously for 2 weeks, check with your doctor. Pregnancy: This medication should not be used during pregnancy unless the benefits outweigh the risks. If you become pregnant while taking this medication, contact your doctor immediately. Breast-feeding: This medication passes into breast milk. If you are a breast-feeding mother and are taking ranitidine, it may affect your baby. Talk to your doctor about whether you should continue breast-feeding.

Children: The safety and effectiveness of using this medication have not been established for children less than 8 years of age. Children between the ages of 8 years and 16 years of age, should only use this medication under the supervision of a doctor.

Seniors: Seniors may be more likely to experience interactions with other medications when taking ranitidine. If you are a senior, your doctor should closely monitor your condition. If you are taking any of these medications, speak with your doctor or pharmacist. Depending on your specific circumstances, your doctor may want you to:. An interaction between two medications does not always mean that you must stop taking one of them. Speak to your doctor about how any drug interactions are being managed or should be managed.

Medications other than those listed above may interact with this medication. Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

Some products need stomach acid so that the body can absorb them properly. Ranitidine decreases stomach acid, so it may change how well these products work. Some affected products include atazanavir, dasatinib, delavirdine, certain azole antifungals such as itraconazole, ketoconazole , pazopanib, among others.

Do not use this medication with other products that contain ranitidine or other H2 blockers cimetidine, famotidine, nizatidine. This medication may interfere with certain laboratory tests including certain urine protein tests , possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.

If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call Otherwise, call a poison control center right away. US residents can call their local poison control center at Canada residents can call a provincial poison control center. Lifestyle changes such as stress reduction programs, stopping smoking, limiting alcohol, and diet changes such as avoiding caffeine and certain spices may help this medication work better.

Talk to your doctor or pharmacist about lifestyle changes that might benefit you. Different brands of this medication have different storage needs. Check the product package for instructions on how to store your brand, or ask your pharmacist. Do not store in the bathroom. Keep all medications away from children and pets. Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed.

Consult your pharmacist or local waste disposal company. Selected from data included with permission and copyright by First DataBank, Inc. This copyrighted material has been downloaded from a licensed ata provider and is not for distribution, except as may be authorized by the applicable terms of use. Conditions of use: The information in this database is intended to supplement, not substitute for the expertise and judgment of healthcare professionals. The information in not intend to cover all possible uses, directions, precautions, drug interactions or adverse effects nor should it be construed in indicate that use of a particular drug is safe, appropriate or effective for you or anyone else.

A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment. This information does not replace the advice of a doctor. If you've taken ranitidine in the past, any risk is likely to be very low, but if you have any concerns, speak to a pharmacist or doctor.

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