Omnipen (ampicillin) prescription available online
If you are suffering from a bacterial infection, Omnipen (ampicillin) can help. Get a new prescription or refill of Omnipen from a board-certified doctor online.
Book an appointmentIf you are suffering from a bacterial infection, Omnipen (ampicillin) can help. Get a new prescription or refill of Omnipen from a board-certified doctor online.
Medication services available for adults and kids (3+)
Top quality, board-certified doctors
Insurance accepted, but not required
Prescriptions sent to your local pharmacy*
*Prescriptions provided at doctor’s discretion.
We accept these insurance plans and many more!
Most patients with in-network insurance pay $30 or less. Paying without insurance? New patient visits are $129, and follow-ups are only $99 for members.
Don’t see your provider listed? Email [email protected] or call (888) 564-4454 to talk to a PlushCare specialist.
3 simple steps to request your Omnipen prescription today
Step 1
Book an Omnipen prescription request appointment.
Book a same day appointment from anywhere.
Step 2
Talk to your medical provider regarding your Omnipen prescription.
Visit with a doctor on your smartphone or computer.
Step 3
Pick up your Omnipen prescription.
We can send prescriptions to any local pharmacy.
Omnipen prescription pricing details
How pricing works
To get a new or refill on your Omnipen prescription, join our monthly membership and get discounted visits.
Paying with insurance
Membership
$14.99/month
First month free
First visit
Copay
For all visits
30 days of free membership
Same-day appointments 7 days a week
Unlimited messages with your Care Team
Prescription discount card to save up to 80%
Exclusive discounts on lab tests
Free memberships for your family
Cancel anytime
Visit price with insurance
Often the same as an office visit. Most patients with in-network insurance pay $30 or less!
- We accept these insurance plans and many more:
Paying without insurance
Membership
$14.99/month
First month free
First visit
$129
Repeats only $99
30 days of free membership
Same-day appointments 7 days a week
Unlimited messages with your Care Team
Prescription discount card to save up to 80%
Exclusive discounts on lab tests
Free memberships for your family
Cancel anytime
Visit price without insurance
Initial visits are $129 and follow-ups are only $99 for active members.
If we're unable to treat you, we'll provide a full refund.
Omnipen prescription FAQs
How much does Omnipen cost?
Depending on your pharmacy, Omnipen costs around $26 for 10 powder injections without insurance. Fortunately, generic brands, such as ampicillin, may offer an affordable alternative. Price may vary depending on your insurance coverage.
How can I refill my Omnipen prescription?
Omnipen is only available by prescription, so you will need to see a board-certified doctor to get a refill on your prescription. To get started, book a virtual appointment with one of our top rated board-certified doctors. After a qualifying evaluation, your prescription will be sent to your local pharmacy for pickup.
What is Omnipen used for?
Omnipen is used to treat a wide variety of bacterial infections, including urinary tract infections, respiratory infections, and endocarditis.
Who should not take ampicillin?
Avoid taking ampicillin if you:
Have had an allergic reaction to cephalosporin antibiotic medicines
Are currently taking allopurinol
Have kidney disease
Tell your doctor if you have any allergies to food or drugs.
What happens if I miss a dose of Omnipen?
If you miss a dose of Omnipen, take the missed dose as soon as you remember. Skip the missed dose if it's almost time for your next dose. Avoid taking two doses to make up for a missed dose.
What happens if I take too much Omnipen?
If you've taken too much Omnipen, contact your local poison control center or seek immediate medical attention.
About Omnipen (ampicillin)
Omnipen is a penicillin antibiotic that fights bacterial infections. Like other antibiotic medicines, Omnipen is not effective against fungal or viral infections.
Omnipen is used to treat or prevent bacterial infections, including bladder infections, pneumonia, meningitis, and others. Omnipen is available only by prescription. It is available in a generic formulation as well as under different brand names, including ampicillin.
Omnipen may be prescribed as an oral capsule, liquid suspension, or powder for injection. It’s always important to follow the specific instructions on your prescription, as they can vary based on the formulation and dosage prescribed.
If you're prescribed Omnipen, be sure to complete the full course of the antibiotic unless your doctor specifically tells you to stop. If you don’t complete your prescription, the antibiotic may not fully treat your bacterial infection.
Omnipen uses
There are several FDA-approved uses for Omnipen, but your healthcare provider may also prescribe it off-label to treat other medical conditions.
Your doctor may prescribe ampicillin for any of the following reasons, or other reasons not listed here. If you have questions about why a medication is prescribed, ask your online doctor or pharmacist.
Respiratory tract infections
Ampicillin is FDA-approved to treat respiratory infections caused by S. pneumoniae, Staphylococcus aureus, H. influenzae, and Group A Streptococci. These infections include the following:
Pneumonia (bacterial)
Bacterial meningitis
Ampicillin is FDA-approved to treat bacterial meningitis caused by E. coli, Group B Streptococci, and other Gram-negative bacteria.
Septicemia and endocarditis
Ampicillin is FDA-approved to treat bacterial blood poisoning (septicemia) and inflammation of the heart valve (endocarditis) caused by bacterial infections.
Urinary tract infections
Ampicillin is FDA-approved to treat UTIs caused by sensitive strains of E. coli and Proteus mirabilis.
Gastrointestinal infections
Ampicillin is FDA-approved to treat gastrointestinal infections caused by Salmonella typhi (typhoid fever), other Salmonella spp., and Shigella spp. (dysentery).
Omnipen side effects
The side effects associated with taking Omnipen are typically mild. Most Omnipen side effects are associated with gastrointestinal discomfort.
Omnipen has some common side effects. They may include:Nausea, vomiting, or upset stomach
Itching or skin rash
Swollen, black, or "hairy" tongue
Other side effects, which are less common but might be more severe, could include:Severe stomach pain
Watery or bloody diarrhea
Joint pain
Tell your doctor if you notice any adverse effects, or if you develop any other new or concerning symptoms.
How to take Omnipen
Your pharmacist will provide you with instructions on how to take your Omnipen prescription. Be sure to read your prescription label and follow the instructions. Call your doctor or pharmacy if you have any questions.
Omnipen can come in different forms and doses, so be sure to follow the specific instructions on your prescription. The initial dose for ampicillin tablets can range from 250 mg to 500 mg, while the oral suspension ranges from 125 mg to 250 mg. Take ampicillin on an empty stomach with a full glass of water.
Omnipen may be injected into a muscle or vein through an IV. Your doctor may show you how to use an IV at home to administer Omnipen.
Omnipen can cause unusual results with certain lab tests. Tell your doctor that you're taking ampicillin before medical tests.
What to avoid while taking Omnipen
Omnipen has 50 drug interactions. Don’t change what you are taking without checking with your doctor or pharmacist. That includes other medications or supplements, as well as over-the-counter drugs.
Possible drug interactions with Omnipen include:
Metoprolol Succinate ER (metoprolol)
Oral contraceptives
Omeprazole
Simvastatin
Warfarin
Avoid taking anti-diarrhea medicine without your doctor's approval.
Alcohol does not interact with ampicillin. However, drinking alcohol can make it harder for your body to fight an infection. Ask your doctor for medical advice before drinking alcohol.
Medication alternatives to Omnipen
If your healthcare provider prefers to put you on another treatment altogether, they may suggest another penicillin antibiotic or an antibiotic medication in another drug class. Here are some common doctor-recommended alternatives based on your health issue:
Respiratory tract infections
Bacterial meningitis
Vancocin (vancomycin)
Merrem (meropenem)
Septicemia and endocarditis
Urinary tract infections
Amoxil (amoxicillin)Rocephin (ceftriaxone)
Omnicef (cefdinir) Ceftin (cefuroxime) Keflex (cephalexin)Gastrointestinal infections