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.
Megestrol acetate oral suspension is indicated for the treatment of anorexia, cachexia, or an unexplained significant weight loss in patients with a diagnosis of acquired immunodeficiency syndrome (AIDS). Limitations of Use Therapy with megestrol acetate oral suspension for weight loss should only be insti‑tuted after treatable causes of weight loss are sought and addressed. These treatable causes include possible malignancies, systemic infections, gastrointestinal disorders affecting absorption, endocrine disease, renal disease or psychiatric diseases. Megestrol acetate oral suspension is not intended for prophylactic use to avoid weight loss. Megestrol acetate oral suspension is a progestin indicated for the treatment of anorexia, cachexia, or an unexplained significant weight loss in patients with a diagnosis of acquired immunodeficiency syndrome (AIDS) (1) .
• History of hypersensitivity to megestrol acetate or any component of the formulation. • Pregnancy [see Warnings and Precautions ( 5.2 ), Use in Specific Populations ( 8.1 , 8.3 )]. • History of hypersensitivity to megestrol acetate or any component of the formulation ( 4 ). • Pregnancy ( 4 )( 8.1 ).
• Use with caution in patients with a history of thromboembolic disease (5.1) . • Fetal Effects: May cause fetal harm. Females of reproductive potential should be advised to avoid becoming pregnant ( 5.2 ). • Clinical cases of overt Cushing's Syndrome have been reported in association with the chronic use of megestrol acetate. In addition, clinical cases of adrenal insufficiency have been observed in patients receiving or being withdrawn from chronic megestrol acetate in the stressed and non-stressed state (5.3) . • New onset and exacerbation of pre-existing diabetes have been reported (5.4) . 5.1 General • Effects on HIV viral replication have not been determined. • Use with caution in patients with a history of thromboembolic disease. 5.2 Fetal Toxicity Based on animal studies, megestrol acetate may cause fetal harm when administered to a pregnant woman. Pregnant rats treated with low doses of megestrol acetate resulted in a reduction in fetal weight and number of live births, and feminization of male fetuses. There are no available human data to assess for any drug associated risks of miscarriage, birth defects, or adverse maternal or fetal outcomes. If this drug is used during ...
The most common adverse events occurring in > 5% of all patients receiving 800mg/20mL of megestrol acetate oral suspension in the two clinical efficacy trials were nausea, diarrhea, impotence, rash, flatulence, hypertension, and asthenia (6.2) . To report SUSPECTED ADVERSE REACTIONS, contact TWi Pharmaceuticals, Inc. at 1-844-518-2989 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Serious and Otherwise Important Adverse Reactions The following serious reactions and otherwise important adverse drug reactions are discussed in greater detail in other sections of the labeling: • Hypersensitivity [see Contraindications ( 4 )] • Thromboembolic Disease [see Warnings and Precautions ( 5.1 )] • Adrenal Insufficiency [see Warnings and Precautions ( 5.3 )] • Diabetes [see Warnings and Precautions ( 5.4 )] 6.2 Clinical Trial Experience Because clinical trials are conducted under widely varying conditions, adverse reactions 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. The safety of megestrol acetate oral suspension, 125 mg/mL was based on three studies of megestrol...
Dosage and Administration ( 2.1 ) 12/2018 Warnings and Precautions ( 5.2 ) 12/2018
Source: FDA SPL label for Megestrol Acetate (Proficient Rx LP), effective 20220401. Full label on DailyMed.
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.
| 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|---|
| 809 | 725 | 661 | 566 | 508 | 431 | 404 | 164 |
2,012 reports blaming this drug for every million Medicare prescriptions filled, which is 0.7× the typical drug on this site. (991 reports in 2024–2026, against 492,517 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.
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.
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.
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.