Omeprazole tablets (OTC)
Omeprazole tablets (OTC)
What is this medicine?
OMEPRAZOLE (oh ME pray zol) prevents the production of acid in the stomach. It is used to treat the symptoms of heartburn. You can buy this medicine without a prescription. This product is not for long-term use, unless otherwise directed by your doctor or health care professional.
How should I use this medicine?
Take this medicine by mouth with a glass of water. Follow the directions on the product label. Do not cut, crush or chew this medicine. Swallow the tablets whole. Take this medicine on an empty stomach, at least 30 minutes before breakfast. Take your medicine at regular intervals. Do not take it more often than directed.
Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.
What side effects may I notice from receiving this medicine?
Side effects that you should report to your doctor or health care professional as soon as possible:
allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
bone pain
breathing problems
fever or sore throat
joint pain
rash on cheeks or arms that gets worse in the sun
redness, blistering, peeling, or loosening of the skin, including inside the mouth
severe diarrhea
signs and symptoms of kidney injury like trouble passing urine or change in the amount of urine
signs and symptoms of low magnesium like muscle cramps; muscle pain; muscle weakness; tremors; seizures; or fast, irregular heartbeat
stomach polyps
unusual bleeding or bruising
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
diarrhea
dry mouth
gas
headache
nausea
stomach pain
What may interact with this medicine?
Do not take this medicine with any of the following medications:
atazanavir
clopidogrel
nelfinavir
rilpivirine
This medicine may also interact with the following medications:
antifungals like itraconazole, ketoconazole, and voriconazole
certain antivirals for HIV or hepatitis
certain medicines that treat or prevent blood clots like warfarin
cilostazol
citalopram
cyclosporine
dasatinib
digoxin
disulfiram
diuretics
erlotinib
iron supplements
medicines for anxiety, panic, and sleep like diazepam
medicines for seizures like carbamazepine, phenobarbital, phenytoin
methotrexate
mycophenolate mofetil
nilotinib
rifampin
St. John's wort
tacrolimus
vitamin B12
What if I miss a dose?
If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.
Where should I keep my medicine?
Keep out of the reach of children.
Store at room temperature between 20 and 25 degrees C (68 and 77 degrees F). Protect from light and moisture. Throw away any unused medicine after the expiration date.
What should I tell my health care provider before I take this medicine?
They need to know if you have any of these conditions:
black or bloody stools
chest pain
difficulty swallowing
have had heartburn for over 3 months
have heartburn with dizziness, lightheadedness or sweating
liver disease
lupus
stomach pain
unexplained weight loss
vomiting with blood
wheezing
an unusual or allergic reaction to omeprazole, other medicines, foods, dyes, or preservatives
pregnant or trying to get pregnant
breast-feeding
What should I watch for while using this medicine?
It can take several days before your heartburn gets better. Tell your healthcare professional if your symptoms do not start to get better or if they get worse. If you need to take this medicine for more than 14 days, talk to your healthcare professional. Heartburn may sometimes be caused by a more serious condition.
This medicine may cause a decrease in vitamin B12. You should make sure that you get enough vitamin B12 while you are taking this medicine. Discuss the foods you eat and the vitamins you take with your health care professional.
Updated:  
October 13, 2019