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glipizide

Sold as Glucotrol. Class: Sulfonylureas. First FDA approval 05/08/1984: 42 years on the US market.

This grade answers one narrow question: how strong is the public evidence and safety record behind this drug, and how clean is its money trail and court record? It is not a verdict on whether the drug is right for you.

B

Score breakdown (86/100)

Safety ×35%
A
Evidence ×25%
F
Regulatory ×15%
A
Money & lawsuits ×15%
A
Options ×10%
A

Safety: 100

Evidence: 43

Regulatory history: 100

Money & lawsuits: 100

Options: 100

What the FDA label says

Approved uses

is indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus. GLUCOTROL XL is a sulfonylurea indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus Limitations of Use: Not for treatment of type 1 diabetes or diabetic ketoacidosis 1.1 Limitations of Use GLUCOTROL XL is not recommended for the treatment of type 1 diabetes mellitus or diabetic ketoacidosis.

Contraindications

Glipizide is contraindicated in patients with: • Known hypersensitivity to glipizide or any of the product's ingredients. • Hypersensitivity to sulfonamide derivatives. ▪ Known hypersensitivity to glipizide or any of the product's ingredients ( 4 ). ▪ Hypersensitivity to sulfonamide derivatives ( 4 ).

Warnings and precautions

▪ Hypoglycemia: May be severe. Ensure proper patient selection, dosing, and instructions, particularly in at-risk populations (e.g., elderly, renally impaired) and when used with other anti-diabetic medications ( 5.1 ). ▪ Hemolytic Anemia: Can occur if glucose 6-phosphate dehydrogenase (G6PD) deficient. Consider a non-sulfonylurea alternative ( 5.2 ). ▪ Potential Increased Risk of Cardiovascular Mortality with Sulfonylureas: Inform patient of risks, benefits and treatment alternatives ( 5.3 ). ▪ Macrovascular Outcomes: No clinical studies have established conclusive evidence of macrovascular risk reduction with GLUCOTROL XL or any other anti-diabetic drug ( 5.4 ). 5.1 Hypoglycemia All sulfonylurea drugs, including GLUCOTROL XL, are capable of producing severe hypoglycemia [see Adverse Reactions (6) ] . Concomitant use of GLUCOTROL XL with other anti-diabetic medication can increase the risk of hypoglycemia. A lower dose of GLUCOTROL XL may be required to minimize the risk of hypoglycemia when combining it with other anti-diabetic medications. Educate patients to recognize and manage hypoglycemia. When initiating and increasing GLUCOTROL XL in patients who may be predisposed to hypo...

Adverse reactions (label)

The following serious adverse reactions are discussed in more detail below and elsewhere in the labeling: • Hypoglycemia [see Warnings and Precautions (5.1) ] • Hemolytic anemia [see Warnings and Precautions (5.2) ] Most common adverse reactions (incidence > 3%) are dizziness, diarrhea, nervousness, tremor, hypoglycemia and flatulence ( 6.1 ). To report SUSPECTED ADVERSE REACTIONS, contact Pfizer, Inc. at 1-800-438-1985 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. In clinical trials, 580 patients from 31 to 87 years of age received GLUCOTROL XL in doses from 5 mg to 60 mg in both controlled and open trials. The dosages above 20 mg are not recommended dosages. In these trials, approximately 180 patients were treated with GLUCOTROL XL for at least 6 months. Table 1 summarizes the incidence of adverse reactions, other than hypoglycemia, that were reported in pooled double-blind, placebo-co...

Source: FDA SPL label for Glucotrol XL (Roerig), effective 20260721. Full label on DailyMed.

Side-effect reports sent to the FDA

These are counts of reports people filed, not rates of harm. Anyone can file one, and nobody checks whether the drug was the cause. Millions of doses are taken for every report sent, so the useful part is how this drug compares with the average across all drugs.

39,991reports that mention this drug
39,903of those blame this drug, not another one the person was taking
55%of reports describe a serious outcome, such as a hospital stay (average for all drugs: 57%)
8.9%of reports include a death, from any cause (average for all drugs: 9.1%)

Problems reported most often

Blood Glucose Increased · 3,145Diarrhoea · 2,395Drug Ineffective · 2,367Nausea · 2,269Fatigue · 2,176Chronic Kidney Disease · 1,671Death · 1,661Acute Kidney Injury · 1,586Off Label Use · 1,466Dyspnoea · 1,455Dizziness · 1,398Headache · 1,297Pain · 1,273Weight Decreased · 1,222Asthenia · 1,215

Reports per year

20192020202120222023202420252026
4,2253,4622,7672,2631,9601,9822,073935

635 reports blaming this drug for every million Medicare prescriptions filled, which is 0.2× the typical drug on this site. (4,959 reports in 2024–2026, against 7,812,781 Medicare fills in one year. This is the one number here that accounts for how many people take the drug.)

Source: the FDA's Adverse Event Reporting System (FAERS). Reports are voluntary and unverified. Drugs that are prescribed a lot, in the news, or in lawsuits attract more reports, so the percentages are compared with the whole database to correct for that partly, not fully.

Recalls and regulatory record

0recall actions on file
2 / 21brand / generic applications
0label changes since 2021
NoREMS program

Evidence base

78randomized trials (PubMed)
1systematic reviews
49registered trials
55%of completed trials posted results
2%terminated or withdrawn
59%industry-funded

Counts measure how much evidence exists and how transparent it is, not how big the benefit is. For that, ask your prescriber: if 100 people like me took this, how many would get better because of it, and how many would be harmed? (Doctors call these the "number needed to treat" and "number needed to harm.") It differs by condition and is the number drug ads leave out. Sources: PubMed, ClinicalTrials.gov.

Money and lawsuits

In 2024, drug companies reported $0 in payments to US physicians and hospitals tied to this drug across 0 transactions.

No pending federal MDL names this drug or its brands.

Not named in any federal pharmaceutical settlement of $100M or more on record.

Sources: CMS Open Payments (Sunshine Act); Judicial Panel on Multidistrict Litigation pending docket list; DOJ settlements as tabulated on Wikipedia with links to the primary record. State-court and individual suits are not included.

Who takes it and what it costs

2,029,090Medicare Part D patients (2024)
7,812,781prescriptions filled
$12average cost per fill
$91Mtotal Medicare spend
ProductFills$/fill
Glipizide4,523,542$10
Glipizide ER3,267,396$14
Glipizide XL20,942$15
Glucotrol XL901$58

Same-class alternatives

acetohexamidecarbutamidechlorpropamideglibornuridegliclazidegliquidoneglyburidetolazamidetolbutamide

Same ATC pharmacological class, graded ones first, best grade at the top. Being in the same class does not make them interchangeable for your condition; it makes them worth asking about.

Questions to ask your prescriber

  1. The most-reported problems in FDA's adverse event data are blood glucose increased, diarrhoea, nausea. How would we recognize and handle those?
  2. Why this one over acetohexamide, carbutamide, chlorpropamide? What would make you pick one of those instead?
  3. What result are we expecting, by when, and what is the plan if it does not happen?
  4. If 100 people like me took this drug, how many would actually get better because of it, and how many would be harmed by it? (Doctors call these the number needed to treat and the number needed to harm.)