Generic cephalexin refers to FDA-approved prescription products containing the same antibacterial active ingredient historically sold as Keflex. U.S. product records include oral capsules and powder for suspension, with certain tablet products also documented. Do not mistake the most frequently dispensed capsule strengths for the complete list ever described in current or archived labels; the strength and regulatory identity of the exact product matter.
This guide separates product approval, dosage form, manufacturer identification and substitution rules. The Keflex brand history explains discontinued original-brand records, while the prescription purchasing guide deals with pharmacy fulfillment. A dosage form appearing in a label cannot, on its own, establish live retail supply for an individual NDC.
Before a pharmacy fill, verify active ingredient, the written strength or liquid concentration, prescribed amount, patient allergies and any dispensing restrictions. FDA records and DailyMed descriptions are valuable evidence about products, but they do not replace pharmacist review or guarantee that a specific manufacturer is currently supplied.
Cephalexin is the established name of the antibiotic active ingredient. The term generic refers to products approved through applicable FDA pathways and sold under that established name rather than the historical Keflex brand.
Approved generics must meet relevant standards; the presence of cephalexin on a bottle alone is not proof that the product matches a particular prescription. FDA records must be interpreted by specific product and application.
| Your next question | Relevant Core guide | What it covers |
|---|---|---|
| Need capsules | Capsule products | Check imprints and solid strengths |
| Need liquid | Suspension family | Compare concentrations and handling |
| Need brand comparison | Keflex versus generic | Clarify ingredient identity |
| Need company names | Manufacturer index | Differentiate applicant and labeler |
| Need pharmacy purchase | Rx buying guide | Match the product to a valid prescription |
Many current U.S. capsule labels, including Teva and Lupin records, list 250 mg and 500 mg products. Other DailyMed capsule documents also describe 333 mg and 750 mg strengths. Those additional strengths are not merely a remembered Keflex brand feature: they appear in generic-labeled documentation, although a searchable label is not proof that a particular product remains orderable at a nearby pharmacy.
When comparing generic capsules, identify the actual applicant or labeler, current document version, strength and package NDC. The capsule guide addresses identification in depth; the 250 mg and 500 mg guides focus on the two commonly encountered strengths. An unusual strength should prompt product-specific verification, not a presumed conversion to another capsule count.
Generic cephalexin oral suspensions commonly display a concentration such as 125 mg/5 mL or 250 mg/5 mL when prepared. The suspension requires measured administration and product-specific storage and discard instructions.
Never compare milliliters across concentrations or treat a larger bottle as a medically preferable purchase. The suspension hub describes selection and dispensing.
A caregiver comparing liquid generics should look beyond the total milligrams in a bottle. The two concentration labels specify the amount in 5 mL, while the pharmacist’s directions specify an individual measured volume. Confusing those two numbers can create dosing errors. The approved generic category does not remove the need for product-specific counseling.
Some cephalexin tablet products appear in regulatory and DailyMed records, but their existence should not be conflated with the wider retail use of capsules. A tablet may have its own approval, strength, score or imprint and a marketing history separate from that of a capsule. Such a record is product evidence, not a commitment that a distributor can supply the same item today.
For a prescription written for tablets, have the pharmacist check the actual dosage form and strength and whether the intended NDC can be supplied. A proposed replacement with capsules or suspension must be reviewed under the prescription and substitution rules. The tablet guide handles this specific catalog question.
The FDA Orange Book reports relevant approved drug products and equivalence evaluations. The NDC Directory contains listing information submitted by labelers; an assigned NDC alone does not mean FDA approval or eligibility for an insurance benefit.
The correct verification combines applicable product approval information with the dispensing label and pharmacy confirmation, not a screenshot of a single number.
Several company names may legitimately be associated with one cephalexin supply chain. The holder of an approved application, the firm named on the labeling, the factory and a repackager can be different organizations. DailyMed sometimes lists a source NDC when one company repackages a product originally listed by another company.
For example, Teva capsule records describe their own 250 mg and 500 mg imprints and NDCs, whereas Lupin records include both capsules and oral-suspension concentrations. Comparing the two as if they have identical labeled portfolios would mislead readers. Use the manufacturer index to trace company roles instead of inferring production origin from a retailer's display name.
Therapeutic equivalence is an FDA assessment applied to specific approved pharmaceutical equivalents, not a blanket conclusion attached to every product sharing the word cephalexin. The Orange Book provides evaluations for qualifying products; FDA's 2026 therapeutic-equivalence guidance explains how to read those evaluations and corresponding codes.
A different form, route or strength cannot be declared an ordinary manufacturer-to-manufacturer replacement just because its active ingredient matches. The dispensing pharmacist checks the approved product and the prescription, then applies applicable state rules. See generic substitution for the product-selection process.
Generic capsules may have different imprints and colors depending on their labeler, strength and packaging. Patients should use imprint and labeled product data for identification, not an assumption that all cephalexin looks alike.
If the appearance changes at refill, request verification from the pharmacist. Changes in excipients may also be relevant to people with a known ingredient sensitivity.
When a generic refill looks different, verify the imprint and product label before using it. Inactive ingredients can differ, so anyone with a documented excipient sensitivity should also consult the pharmacist. Color and shape alone should not be used either to reject a legitimate generic or to accept an unverified pill.
A generic designation does not produce a single national cash price or copay. The exact strength, form, quantity, pharmacy and insurance benefit affect what the patient pays.
Use the cost hub for evergreen comparison methods, or ask about private-plan and Medicare benefits through the corresponding coverage pages.
A valid U.S. prescription should be filled through a licensed pharmacy that can identify the dispensed product and provide pharmacist support. Avoid sellers promising antibiotics without evaluation, fake brand packages or guaranteed supply from an unverified warehouse.
The online pharmacy safety page distinguishes licensing checks from general buying steps.
Confirm active ingredient, form, strength or concentration, quantity, labeler or manufacturer, prescribed instructions and final pharmacy label. If the exact product differs from what was ordered, ask the pharmacist to explain the permitted substitution or clarify with the prescriber.
This page covers product identity rather than antibiotic selection: infection severity, bacterial susceptibility and patient-specific risks must still be evaluated by a clinician.
Yes. Cephalexin is the active ingredient associated with the historical Keflex brand.
FDA-approved generic products exist; confirm the exact product and application rather than relying on a name or NDC alone.
U.S. labels document capsules, oral suspension and certain tablets. Capsules commonly appear in 250 mg and 500 mg strengths; some additional label records also describe 333 mg and 750 mg. Confirm the specific product and its current supply with the pharmacy.
Yes. Appearance and inactive ingredients can differ by manufacturer or packager; pharmacists can confirm the actual product.
No. The dosage forms and administration instructions differ, and substitution may need prescriber confirmation.
No. FDA explicitly says an NDC number or Directory listing alone does not denote approval.
No blanket price ranking is reliable. Compare the exact strength, form, quantity and payment method.
No. Cephalexin requires a valid U.S. prescription.