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insulin human/insulin isophane

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Brand names: Humulin 70/30

Intermediate-Acting Insulin Combination Rx

Humulin 70/30 is a mix of two types of insulin. It helps control blood sugar in adults with diabetes.

What it does

Humulin 70/30 is used to improve blood sugar control in adults with diabetes.

Common side effects

Low blood sugar (hypoglycemia), Allergic reactions like redness and swelling at the injection site, Skin changes at the injection site

Key warnings

Never share a Humulin 70/30 KwikPen or syringe with anyone else, even if the needle is changed.

How It Works

This medicine is a mix of two insulins: one that works quickly and one that works longer. The short-acting insulin helps control blood sugar after meals. The intermediate-acting insulin works between meals and during the night.

How to Take It

Inject Humulin 70/30 under your skin (subcutaneously). You can inject it in your belly area, thigh, upper arm, or buttocks. Inject it 30 to 45 minutes before you eat a meal. Do not inject into areas with skin depressions or thickening.

Pregnancy & Breastfeeding

Tell your doctor if you are pregnant or plan to become pregnant. Good control of diabetes is important during pregnancy. This medicine may pass into breast milk, but it is not expected to harm your baby.

Missed Dose

If you miss a dose, check your blood sugar and take your next dose as scheduled. Do not take a double dose to make up for a missed dose.

Storage

Keep Humulin 70/30 in its original carton, away from heat and light. Do not freeze it.

Side Effects (from patient reports)

Based on 27,609 FDA adverse event reports.

High blood sugar
10,557
Low blood sugar
3,451
Medicine not working
3,144
Wrong dose given
2,164
Low blood sugar
1,532
Feeling sick to your stomach
1,473
Vision problems
1,462
Weight loss
1,308
Shortness of breath
1,275
Falling down
1,243

Serious Warnings

Never share a Humulin 70/30 KwikPen or syringe with anyone else, even if the needle is changed. Sharing pens or syringes can spread blood-borne diseases. Changes in your insulin dose should be done carefully with your doctor's supervision. Low blood sugar can be life-threatening. Fluid retention and heart failure can occur if you also take thiazolidinediones (TZDs).

Known Drug Interactions

moderate fluoxetine

7 DRUG INTERACTIONS Table 1: Clinically Significant Drug Interactions with HUMULIN 70/30 Drugs that May Increase the Risk of Hypoglycemia Drugs: Antidiabetic agents, ACE inhibitors, angiotensin II receptor blocking agents, disopyramide, fibrates, fluoxetine, monoamine oxidase inhibitors, pentoxifylline, pramlintide, salicylates, somatostatin analog (e.g., octreotide), and sulfonamide antibiotics Intervention: Dose adjustment and increased frequency of glucose monitoring may be required when HUMULIN 70/30 is co-administered with these drugs.

Mechanism: Fluoxetine can increase the risk of low blood sugar when taken with insulin.

What to do: Your doctor may need to adjust your dose and you should check your blood sugar levels more frequently.

moderate pramlintide

7 DRUG INTERACTIONS Table 1: Clinically Significant Drug Interactions with HUMULIN 70/30 Drugs that May Increase the Risk of Hypoglycemia Drugs: Antidiabetic agents, ACE inhibitors, angiotensin II receptor blocking agents, disopyramide, fibrates, fluoxetine, monoamine oxidase inhibitors, pentoxifylline, pramlintide, salicylates, somatostatin analog (e.g., octreotide), and sulfonamide antibiotics Intervention: Dose adjustment and increased frequency of glucose monitoring may be required when HUMULIN 70/30 is co-administered with these drugs.

Mechanism: Pramlintide can increase the risk of low blood sugar when taken with insulin.

What to do: Your doctor may need to adjust your dose and you should check your blood sugar levels more frequently.

moderate octreotide

7 DRUG INTERACTIONS Table 1: Clinically Significant Drug Interactions with HUMULIN 70/30 Drugs that May Increase the Risk of Hypoglycemia Drugs: Antidiabetic agents, ACE inhibitors, angiotensin II receptor blocking agents, disopyramide, fibrates, fluoxetine, monoamine oxidase inhibitors, pentoxifylline, pramlintide, salicylates, somatostatin analog (e.g., octreotide), and sulfonamide antibiotics Intervention: Dose adjustment and increased frequency of glucose monitoring may be required when HUMULIN 70/30 is co-administered with these drugs.

Mechanism: Octreotide can lower blood sugar levels, which adds to the effect of insulin and makes low blood sugar more likely.

What to do: Your doctor may need to adjust your insulin dose and you should check your blood sugar more often.

Drugs that May Decrease the Blood Glucose Lowering Effect of HUMULIN 70/30 Drugs: Atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g., albuterol, epinephrine, terbutaline), and thyroid hormones.

Mechanism: Albuterol can cause the liver to release more sugar into the blood, which reduces the effectiveness of your insulin.

What to do: Keep a close eye on your blood sugar levels and talk to your doctor about adjusting your insulin dose.

Drugs that May Increase or Decrease the Blood Glucose Lowering Effect of HUMULIN 70/30 Drugs: Alcohol, beta-blockers, clonidine, and lithium salts. Drugs that May Blunt Signs and Symptoms of Hypoglycemia Drugs: Beta-blockers, clonidine, guanethidine, and reserpine Intervention: Increased frequency of glucose monitoring may be required when HUMULIN 70/30 is co-administered with these drugs. ( 7 ) Antiadrenergic Drugs (e.g., beta-blockers, clonidine, guanethidine, and reserpine): Signs and symptoms of hypoglycemia may be reduced or absent.

Mechanism: Clonidine can change how well insulin works and hide the normal warning signs of low blood sugar, such as a fast heartbeat.

What to do: You should check your blood sugar levels more often when taking these two medicines together.

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Common Questions

What should the medicine look like?
Humulin 70/30 should look white and cloudy. Do not use it if it has clumps or looks clear.
Can I mix Humulin 70/30 with other insulins?
No, do not mix Humulin 70/30 with any other insulins or liquids.
How often should I check my blood sugar?
Check your blood sugar as often as your doctor tells you to, especially when you change your insulin dose.
What happens if I inject into the same spot every time?
Repeated injections into the same spot can cause skin problems. Rotate injection sites.
What should I do if my blood sugar is too low?
If your blood sugar is low, eat or drink something with sugar in it right away.
Can other medicines affect Humulin 70/30?
Yes, many medicines can affect your blood sugar levels. Tell your doctor about all the medicines you take.
How long can I use a Humulin 70/30 vial once it is opened?
You can use a Humulin 70/30 vial for 31 days at room temperature.
How long can I use a Humulin 70/30 KwikPen once it is opened?
You can use a Humulin 70/30 KwikPen for 10 days at room temperature.
What are the signs of low blood sugar?
Signs of low blood sugar include shakiness, sweating, dizziness, and confusion.
What are the signs of high blood sugar?
Signs of high blood sugar include increased thirst, frequent urination, and blurred vision.
What are the common side effects of insulin human/insulin isophane?
The most commonly reported side effects of insulin human/insulin isophane include Low blood sugar (hypoglycemia), Allergic reactions like redness and swelling at the injection site, Skin changes at the injection site, Weight gain. Based on 27,609 FDA adverse event reports. Always consult your healthcare provider about potential side effects.
Does insulin human/insulin isophane interact with other medications?
Yes, insulin human/insulin isophane has 11 known drug interactions. Notable interactions include fluoxetine, pramlintide, octreotide. Always inform your doctor about all medications you are taking.
What drug class is insulin human/insulin isophane?
insulin human/insulin isophane belongs to the Intermediate-Acting Insulin Combination drug class. It requires a prescription (Rx). Humulin 70/30 is used to improve blood sugar control in adults with diabetes.
Is insulin human/insulin isophane safe during pregnancy?
Tell your doctor if you are pregnant or plan to become pregnant. Good control of diabetes is important during pregnancy. Always consult your healthcare provider before using any medication during pregnancy or breastfeeding.

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What the FDA Data Shows for insulin human/insulin isophane

The FDA label for insulin human/insulin isophane (sold under brand names such as Humulin 70/30) classifies it as a prescription-only medication in the Intermediate-Acting Insulin Combination class. Humulin 70/30 is used to improve blood sugar control in adults with diabetes. Official labeling lists 4 commonly reported side effects, including Low blood sugar (hypoglycemia), Allergic reactions like redness and swelling at the injection site, Skin changes at the injection site.

Post-market surveillance from the FDA Adverse Event Reporting System (FAERS) captures real-world experience. For this drug, FAERS contains 27,609 voluntary reports. The database also lists 11 documented drug interactions derived from FDA labeling, with the top-flagged interaction rated moderate severity. Acquisition-cost data is surveyed weekly by CMS and updated as manufacturers report changes.

Report counts do not establish causation — a FAERS entry documents a temporal association, not proof that the drug produced the outcome. Widely prescribed medications naturally accumulate more reports than niche therapies, so raw totals must be interpreted alongside total exposure. Shortage status, recall history, and patent information further shape supply and switching decisions. This page summarizes public FDA data for educational purposes only and is not a substitute for professional medical advice — always consult a licensed healthcare provider before starting, stopping, or changing any medication.

Data Sources

Drug labeling: FDA Drug Labels (SPL/DailyMed). Adverse events: FDA Adverse Event Reporting System (FAERS).

FAERS reports are voluntary and do not establish causation. Drug interactions are derived from FDA labeling and clinical references. Always consult a healthcare professional before making medication decisions.

Last updated: December 10, 2024

All federal data sources used on this page