dynabac
Dynabac (Dirithromycin) is a medication used to treat Bronchitis, Haemophilus Infections, Staphylococcal Infections, Streptococcal Infections.
Dirithromycin · by Lilly Res Labs
Key facts
- Active ingredient
- Dirithromycin
- Form
- Tablet, delayed release
- Strength
- Dirithromycin 250MG
- Type
- Prescription (Rx)
- Brand or generic
- Brand-name
- Manufacturer
- Lilly Res Labs
- FDA application
- NDA050678
- Availability
- Discontinued (per FDA)
May treat (source: NIH RxClass)
- bronchitis
- haemophilus infections
- staphylococcal infections
- streptococcal infections
- tonsillitis
- community-acquired infections
Dosage forms
Tablet, delayed release
The forms currently marketed in the U.S., per the FDA National Drug Code Directory.
Ways to save
Ask for the generic
Same active ingredient, far cheaper. Is there a generic? →
Request a 90-day supply
Bulk fills usually lower the per-dose price vs monthly refills.
Use copay cards
Manufacturer copay cards & patient-assistance programs — especially for brand drugs.
Compare alternatives
A same-class option may cost less. See alternatives →
Frequently asked questions
- What does Dynabac treat?
- Dynabac (Dirithromycin) may be used to treat bronchitis, haemophilus infections, staphylococcal infections, streptococcal infections, tonsillitis, community-acquired infections, based on NIH RxClass drug-classification data (conditions a drug may treat — not a verbatim copy of the FDA-approved label). This is general reference, not medical advice.
- Is there a coupon or discount for Dynabac?
- pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Dynabac. To pay less, ask your prescriber or pharmacist whether a generic equivalent exists, check the manufacturer's copay/savings card and patient-assistance program, and compare a pharmacy discount card against your insurance copay. Prices vary by pharmacy, insurance, and location, so always confirm at the counter. This is general reference, not medical or financial advice.
- Who makes Dynabac?
- Dynabac is marketed by Lilly Res Labs. You can see Lilly Res Labs's full profile, rating, and other products on pharmaranks.
- Is Dynabac a brand-name or generic drug?
- Dynabac is a brand-name product with the active ingredient Dirithromycin.
- Is Dynabac available over the counter?
- No. Dynabac is a prescription (Rx) medication in the US — you need a prescription from a licensed clinician (in person or via telehealth); it isn't sold over the counter. For some conditions there are OTC alternatives — ask your pharmacist.
- What forms does Dynabac come in?
- Dynabac is currently marketed as tablet, delayed release, per the FDA's National Drug Code Directory.
- Is Dynabac FDA-registered?
- Dynabac is on record with the U.S. FDA under application number NDA050678. You can verify this on its official FDA label.
Information is sourced from public FDA regulatory data. Provided for general reference only — not medical advice. Always consult a licensed professional and the current prescribing information.
What people report to the FDA about DIRITHROMYCIN
The FDA Adverse Event Reporting System (FAERS) collects reports from patients and clinicians. It holds 8 reports naming DIRITHROMYCIN — the active ingredient in Dynabac, and the FDA flagged 88% of those reports as serious. The effects reported most often — leaving out reports about overdose, misuse or the condition being treated, which dominate the raw list for common medicines:
- chest pain2 reports
- anaphylactic reaction1 reports
- asthenia1 reports
- blindness unilateral1 reports
- blood hiv rna increased1 reports
- blood pressure increased1 reports
- bone marrow failure1 reports
- breast cancer female1 reports
Read these as a signal, not a rate. A report does not mean DIRITHROMYCIN caused the effect — anyone can file one, and many describe people taking several medicines for several conditions. Crucially there is no denominator: FAERS does not record how many people took the drug, so these counts cannot be turned into “X% of patients” — a bigger number often just means a more widely used or more talked-about drug. Duplicates exist, and publicity drives reporting. For what is actually established, read the FDA label.
Source: openFDA drug/event (FAERS), retrieved September 25, 2026.
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