Generic Name: Penicillin G (Parenteral/Aqueous) (pen i SIL in jee, pa REN ter al, AYE kwee us)
Brand Name: Pfizerpen
Medically reviewed on May 2, 2018
Uses of Pfizerpen:
- It is used to treat bacterial infections.
What do I need to tell my doctor BEFORE I take Pfizerpen?
- If you have an allergy to penicillin or any other part of Pfizerpen (penicillin G (parenteral/aqueous)).
- If you are allergic to any drugs like this one, any other drugs, foods, or other substances. Tell your doctor about the allergy and what signs you had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
- If you are taking chloramphenicol, erythromycin, a sulfa-drug like sulfamethoxazole, or a tetracycline drug like doxycycline. Talk with your doctor or pharmacist if you are not sure.
This is not a list of all drugs or health problems that interact with Pfizerpen (penicillin G (parenteral/aqueous)).
Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Pfizerpen (penicillin G (parenteral/aqueous)) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.
What are some things I need to know or do while I take Pfizerpen?
- Tell all of your health care providers that you take Pfizerpen (penicillin G (parenteral/aqueous)). This includes your doctors, nurses, pharmacists, and dentists.
- Very bad and sometimes deadly allergic side effects have rarely happened. Talk with your doctor.
- Have your blood work checked if you are on Pfizerpen (penicillin G (parenteral/aqueous)) for a long time. Talk with your doctor.
- Do not use longer than you have been told. A second infection may happen.
- When given in large doses, Pfizerpen (penicillin G (parenteral/aqueous)) may cause very bad and even deadly electrolyte problems. Talk with the doctor.
- If you have high blood sugar (diabetes), do not use Clinitest®. Use some other urine glucose testing like Clinistix® or Tes-Tape®.
- This medicine may affect certain lab tests. Be sure your doctor and lab workers know you use Pfizerpen (penicillin G (parenteral/aqueous)).
- If you are on a low-sodium or low-potassium diet, talk with your doctor.
- Use with care in newborns. Talk with the doctor.
- Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using Pfizerpen (penicillin G (parenteral/aqueous)) while you are pregnant.
- Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.
How is this medicine (Pfizerpen) best taken?
Use Pfizerpen (penicillin G (parenteral/aqueous)) as ordered by your doctor. Read all information given to you. Follow all instructions closely.
- It is given as a shot into a muscle or as an infusion into a vein over a period of time.
What do I do if I miss a dose?
- Call your doctor to find out what to do.
See also: Dosage Information (in more detail)
What are some side effects that I need to call my doctor about right away?
WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
For all uses of Pfizerpen (penicillin G (parenteral/aqueous)):
- Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
- Signs of a high potassium level like a heartbeat that does not feel normal; change in thinking clearly and with logic; feeling weak, lightheaded, or dizzy; feel like passing out; numbness or tingling; or shortness of breath.
- Very bad dizziness or passing out.
- Fever or chills.
- A fast heartbeat.
- Fast breathing.
- Feeling very tired or weak.
- Yellow skin or eyes.
- Muscle or joint pain.
- Stomach pain.
- Any unexplained bruising or bleeding.
- Not able to pass urine or change in how much urine is passed.
- It is common to have diarrhea when taking Pfizerpen (penicillin G (parenteral/aqueous)). Rarely, a very bad form of diarrhea called Clostridium difficile (C diff)–associated diarrhea (CDAD) may occur. Sometimes, this has led to a deadly bowel problem (colitis). CDAD may happen while you are taking Pfizerpen (penicillin G (parenteral/aqueous)) or within a few months after you stop taking it. Call your doctor right away if you have stomach pain or cramps, very loose or watery stools, or bloody stools. Do not try to treat loose stools without first checking with your doctor.
Injection (if given in the muscle):
- Nerve damage can happen if Pfizerpen (penicillin G (parenteral/aqueous)) is given into or near a nerve. This could be long-lasting. Call your doctor right away if you have any numbness, tingling, or weakness.
What are some other side effects of Pfizerpen?
All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
- Loose stools (diarrhea).
- Upset stomach or throwing up.
- Mouth irritation or mouth sores.
- Change in tongue color.
- Irritation where the shot is given.
These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.
You may report side effects to the FDA at 1-800-FDA-1088. You may also report side effects at http://www.fda.gov/medwatch.
See also: Side effects (in more detail)
If OVERDOSE is suspected:
If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
How do I store and/or throw out Pfizerpen?
- If you need to store Pfizerpen (penicillin G (parenteral/aqueous)) at home, talk with your doctor, nurse, or pharmacist about how to store it.
Consumer information use
- If your symptoms or health problems do not get better or if they become worse, call your doctor.
- Do not share your drugs with others and do not take anyone else's drugs.
- Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
- Talk with the doctor before starting any new drug, including prescription or OTC, natural products, or vitamins.
- Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
- Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.
- Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about Pfizerpen (penicillin G (parenteral/aqueous)), please talk with your doctor, nurse, pharmacist, or other health care provider.
- If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
More about Pfizerpen (penicillin g potassium)
- Pfizerpen Side Effects
- During Pregnancy
- Dosage Information
- Drug Interactions
- Support Group
- Pricing & Coupons
- En Español
- 0 Reviews – Add your own review/rating
- Drug class: natural penicillins