Medically reviewed on Sep 5, 2018
Uses of Humulin R:
- It is used to lower blood sugar in patients with high blood sugar (diabetes).
What do I need to tell my doctor BEFORE I take Humulin R?
- If you have an allergy to insulin or any other part of Humulin R (insulin regular (U-100) vials).
- 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 have low blood sugar.
This is not a list of all drugs or health problems that interact with Humulin R (insulin regular (U-100) vials).
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 Humulin R (insulin regular (U-100) vials) 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 Humulin R?
- Tell all of your health care providers that you take Humulin R (insulin regular (U-100) vials). This includes your doctors, nurses, pharmacists, and dentists.
- Allergic reactions have happened with Humulin R (insulin regular (U-100) vials). Rarely, some reactions can be very bad or life-threatening. Talk with the doctor.
- Be sure you have the right insulin product. Insulin products come in many containers like vials, cartridges, and pens. Be sure that you know how to measure and get your dose ready. If you have any questions, call your doctor or pharmacist.
- Low blood sugar may happen with Humulin R (insulin regular (U-100) vials). Very low blood sugar can lead to seizures, passing out, long lasting brain damage, and sometimes death. Talk with the doctor.
- Low blood potassium may happen with Humulin R (insulin regular (U-100) vials). If not treated, this can lead to a heartbeat that is not normal, very bad breathing problems, and sometimes death. Talk with the doctor.
- Avoid driving and doing other tasks or actions that call for you to be alert until you see how Humulin R (insulin regular (U-100) vials) affects you.
- Some diabetes drugs like pioglitazone or rosiglitazone may cause heart failure or make it worse in people who already have it. Using insulin with these drugs may increase this risk. If you also take one of these drugs, talk with the doctor.
- Do not switch between different forms of Humulin R (insulin regular (U-100) vials) without first talking with the doctor.
- It may be harder to control your blood sugar during times of stress like when you have a fever, an infection, an injury, or surgery. A change in level of physical activity or exercise and a change in diet may also affect your blood sugar. Talk with your doctor.
- Wear disease medical alert ID (identification).
- Do not drive if your blood sugar has been low. There is a greater chance of you having a crash.
- Check your blood sugar as you have been told by your doctor.
- Have blood work checked as you have been told by the doctor. Talk with the doctor.
- Avoid drinking alcohol or taking products that have alcohol in them while taking Humulin R (insulin regular (U-100) vials).
- Do not share your insulin product with another person. This includes any pens, cartridge devices, needles, or syringes, even if the needle has been changed. Sharing may pass infections from one person to another. This includes infections you may not know you have.
- If you are 65 or older, use Humulin R (insulin regular (U-100) vials) with care. You could have more side effects.
- Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using Humulin R (insulin regular (U-100) vials) 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 (Humulin R) best taken?
Use Humulin R (insulin regular (U-100) vials) as ordered by your doctor. Read all information given to you. Follow all instructions closely.
- It is given as a shot into the fatty part of the skin in the upper arm, thigh, buttocks, or stomach area.
- If you will be giving yourself the shot, your doctor or nurse will teach you how to give the shot.
- Follow how to use as you have been told by the doctor or read the package insert.
- Wash your hands before use.
- Take 30 minutes before meals.
- Move the site where you give the shot with each shot.
- Do not shake.
- Do not give into red or irritated skin.
- Do not use if the solution is cloudy, leaking, or has particles.
- Do not use if solution changes color.
- Throw away needles in a needle/sharp disposal box. Do not reuse needles or other items. When the box is full, follow all local rules for getting rid of it. Talk with a doctor or pharmacist if you have any questions.
- Do not use out dated insulin.
- Do not draw into a syringe and store for future use.
- It may be given into a vein by a doctor or other healthcare provider.
- Some brands of Humulin R (insulin regular (U-100) vials) must not be used in an insulin pump unless your doctor tells you to. If you will be using an insulin pump, check with your doctor or pharmacist to see if your brand may be used in a pump.
- If you are using Humulin R (insulin regular (U-100) vials) in a pump, be sure you know how to use it. Follow what your doctor has told you or read the package insert. Change the drug and parts of the pump when you have been told.
- Keep using Humulin R (insulin regular (U-100) vials) as you have been told by your doctor or other health care provider, even if you feel well.
- Follow the diet and workout plan that your doctor told you about.
- Be sure you know what to do if you do not eat as much as normal or if you skip a meal.
What do I do if I miss a dose?
- Be sure you know what to do if you forget to take a dose.
- If you are not sure what to do if you miss a dose, call your doctor.
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:
- 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 low potassium levels like muscle pain or weakness, muscle cramps, or a heartbeat that does not feel normal.
- Change in eyesight.
- Very bad dizziness or passing out.
- Mood changes.
- Slurred speech.
- Very bad irritation where the shot was given.
- A burning, numbness, or tingling feeling that is not normal.
- Swelling in the arms or legs.
- Change in skin to thick or thin where the shot was given.
- Low blood sugar may occur. Signs may be dizziness, headache, feeling sleepy, feeling weak, shaking, a fast heartbeat, confusion, hunger, or sweating. Call the doctor right away if any of these signs occur. Follow what you have been told to do if low blood sugar occurs. This may include taking glucose tablets, liquid glucose, or some fruit juices.
What are some other side effects of Humulin R?
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:
- Weight gain.
- 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.
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 Humulin R?
- Store unopened vials in a refrigerator. Do not freeze.
- You may store unopened containers at room temperature. If you store at room temperature, be sure you know how long the product is good for. Ask the doctor or pharmacist if you are not sure.
- After opening, be sure you know how long the product is good for and how to store it. Ask the doctor or pharmacist if you are not sure.
- Protect from light.
- Do not use if it has been frozen.
- Protect opened containers from heat.
- 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.
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.
- Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about Humulin R (insulin regular (U-100) vials), 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 Humulin R (insulin regular)
- Humulin R Side Effects
- During Pregnancy
- Dosage Information
- Drug Interactions
- Compare Alternatives
- Support Group
- Pricing & Coupons
- En Español
- Drug class: insulin