Tylan 50 for Chickens: Uses, Dosage & Safety Guide
By Erick Updated 10 min read
On this page (8 sections)
- The short version
- What Tylan 50 is and what it treats in chickens
- Tylan 50 use in chickens: dose and injection method
- Is it safe to give chickens injectable Tylan 50 by mouth
- Treating mycoplasma in chickens with Tylan 50
- Withdrawal times for eggs and meat after Tylan 50 treatment
- Storage, shelf life, and safety of opened Tylan 50 vials
- Questions people still ask
In short: Tylan 50 is an injectable tylosin antibiotic for treating respiratory infections in chickens, dosed at 0.5 to 1 mL per 5 pounds of body weight, injected into breast muscle once daily for 3 to 5 days. It is not effective orally and requires a withdrawal period before you can eat eggs or meat.
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Tylan 50 works only when injected into muscle—giving it by mouth wastes the drug and leaves the infection untreated.
| Active ingredient | Tylosin tartrate, 50 mg/mL |
|---|---|
| Dose for chickens | 0.5–1 mL per 5 lb body weight |
| Injection site | Breast muscle, daily for 3–5 days |
| Meat withdrawal | 21 days after last injection |
| Egg withdrawal | 3–5 days minimum (not labeled) |
| Oral use | Not effective—injection only |
| Storage after opening | Refrigerate, use within 28 days |
The short version
- Inject Tylan 50 into the breast muscle: oral dosing does not work because stomach acid destroys tylosin
- Dose at 0.5 to 1 mL per 5 pounds body weight once daily for 3 to 5 days for respiratory infections
- Wait 21 days after the last injection before slaughtering, and discard eggs for 3 to 5 days minimum
- Tylan 50 treats chronic respiratory disease and airsacculitis but does not cure carrier birds
- Store unopened bottles at room temperature; use opened vials within 28 days and keep refrigerated
What Tylan 50 is and what it treats in chickens
Tylan 50 is an injectable antibiotic solution containing 50 mg of tylosin tartrate per milliliter. Tylosin is a macrolide antibiotic effective against gram-positive bacteria and some mycoplasmas. Chickens get it for chronic respiratory disease caused by Mycoplasma gallisepticum and for airsacculitis triggered by secondary bacterial infections like E. coli.
You inject it into muscle tissue. The drug is absorbed into the bloodstream and reaches the respiratory tract, where it stops bacteria from making proteins. That halts the infection's spread and gives the bird's immune system time to clear it. Tylan 50 does not work against viruses, so it won't help with infectious bronchitis or Newcastle disease unless there's a secondary bacterial infection.
The formulation is designed for livestock, including swine and cattle. Chickens are not a labeled species in the US, so any use in poultry is off-label. That means you follow dosing guidelines from veterinary references and poultry pathology studies, not the product insert. The drug has been used in commercial and backyard flocks for decades, and the dosing protocols are well established.
Tylan 50 treats active infections but does not cure carrier birds. A hen infected with Mycoplasma gallisepticum may stop showing symptoms after treatment, but she remains a carrier for life and can infect other birds. You use Tylan 50 to manage outbreaks, not to eliminate mycoplasma from a flock. We go through treatment guide for oxytetracycline step by step elsewhere on the site.
Tylan 50 use in chickens: dose and injection method
The standard dose is 0.5 to 1 mL per 5 pounds of body weight once daily. A 5-pound hen gets 0.5 to 1 mL. A 7-pound bird gets 0.7 to 1.4 mL. You inject it into the breast muscle, which is the thick muscle on either side of the keel bone. Use a 20- to 22-gauge needle, half to three-quarters of an inch long.
Hold the bird firmly or have someone else restrain it. Identify the breast muscle by running your finger along the keel bone, then moving laterally into the muscle mass. Insert the needle at a 45-degree angle, aiming slightly away from the keel to avoid the bone. Pull back on the plunger before injecting. If you see blood, pull out and reposition: you've hit a vessel. If no blood, inject slowly and withdraw the needle.
Treat once daily for 3 to 5 days. Most respiratory infections respond within 3 days, but severe cases or airsacculitis may need the full 5 days. If the bird shows no improvement after 5 days, the infection is either resistant or caused by something tylosin doesn't cover. Stop treatment and consult a vet or get a necropsy if the bird dies. For the detail, see our notes on how to dose corid safely.
Rotate injection sites between the left and right breast muscles each day. Repeated injections in the same spot cause muscle damage and scar tissue, which makes the meat tough and reduces absorption. Mark which side you used on your treatment log.
Is it safe to give chickens injectable Tylan 50 by mouth
No. Injectable Tylan 50 is not effective orally. Tylosin tartrate in the injectable form is not protected from stomach acid and bile. Most of the dose is broken down before it can reach the bloodstream.
The amount that reaches the blood depends on the bird and on how you give it. You can measure actual absorption with a veterinary lab that runs plasma tylosin assays. Ask your vet for a timed blood sample and you will get a concrete number for your flock under your conditions. We cover treating chicken eye infections in its own article.
If you can't get injections done, use a product made for drinking water. Tylan Soluble Powder is formulated to dissolve and deliver repeat small doses. The usual guideline is 1 gram of powder per gallon of water for 3 to 5 days. That keeps levels steadier than one oral shot of injectable.
Giving injectable Tylan 50 by mouth wastes the drug. It delays treatment and lets the infection spread. Get someone to inject for you, or switch to the soluble powder so the birds actually get a therapeutic dose.
Treating mycoplasma in chickens with Tylan 50
Mycoplasma gallisepticum causes chronic respiratory disease, also called CRD or mycoplasmosis. Infected birds show nasal discharge, sneezing, watery eyes, and swollen sinuses. The infection spreads slowly through a flock, and stress (cold weather, overcrowding, poor ventilation) triggers outbreaks. M. gallisepticum is passed through eggs, so chicks from infected hens are often carriers. The other half of this decision is managing vent mites.
Tylan 50 controls the symptoms but does not eliminate the organism. Treated birds stop sneezing and resume normal activity within 3 to 5 days, but they remain infected. Mycoplasma bacteria lack a cell wall, so they're harder to kill than typical bacteria. They hide inside cells and reactivate when the bird is stressed again.
The practical approach is to treat outbreaks as they occur and cull chronic cases. If a hen has repeated respiratory episodes despite treatment, she's a reservoir. Remove her from the flock to prevent transmission. Test new birds before introducing them, using a rapid M. gallisepticum plate agglutination test. Most hatcheries sell MG-negative stock, which means the breeding flock tested negative. Buy from those sources.
Airsacculitis often follows mycoplasma infection. The air sacs become inflamed and fill with caseous exudate, a thick yellow-white material. E. coli is the usual secondary invader. Birds with airsacculitis show labored breathing, open-mouth breathing, and reduced activity. Tylan 50 treats the bacterial component, but the damage to the air sacs may be permanent. Severe cases die despite treatment.
| Condition | Symptoms | Response time | Outcome |
|---|---|---|---|
| Chronic respiratory disease (CRD) | Nasal discharge, sneezing, swollen sinuses | 3–5 days | Symptoms resolve, bird remains carrier |
| Airsacculitis | Labored breathing, open mouth, lethargy | 5–7 days | Variable; severe cases may not recover |
| Secondary bacterial infection | Coughing, rattling, reduced feed intake | 3–5 days | Good if treated early, poor if advanced |
Withdrawal times for eggs and meat after Tylan 50 treatment
The labeled withdrawal time for Tylan 50 in swine is 21 days before slaughter. No withdrawal time is listed for poultry because chickens are not a labeled species. Veterinary guidance and the Food Animal Residue Avoidance Databank recommend a 21-day meat withdrawal for chickens treated with injectable tylosin off-label. That means you wait 21 days after the last injection before processing the bird for meat.
Egg withdrawal is not officially established, but residue studies suggest tylosin appears in eggs for 3 to 5 days after the last injection. Most backyard keepers discard eggs for 5 to 7 days to be safe. If you sell eggs, the safe approach is a 7-day discard period. If you're treating a laying hen and plan to eat the eggs yourself, 3 days is probably adequate, but 5 is better.
Tylosin residues in meat and eggs drop below detectable levels within the withdrawal period if the dose was correct. Overdosing or treating for longer than 5 days extends the withdrawal time because the drug accumulates in tissue. Stick to the recommended dose and duration. If you had to treat for 7 days because the infection was severe, extend the withdrawal time to 28 days for meat and 7 days for eggs.
Keep a written log of every treatment: date, bird ID, dose, and withdrawal end date. If you sell eggs or meat, you may be asked to show proof of withdrawal compliance. Some states require a veterinary prescription or veterinary oversight for off-label antibiotic use in food animals, even backyard flocks. Check your state's rules.
Storage, shelf life, and safety of opened Tylan 50 vials
Store unopened Tylan 50 bottles at room temperature, away from direct sunlight. The manufacturer's shelf life is printed on the label, usually 2 years from the date of manufacture. Once you puncture the rubber stopper, the vial is exposed to air and potential contamination. Use it within 28 days and store it in the refrigerator between uses.
The solution should be clear and pale yellow. If it turns cloudy, develops particles, or changes to brown, discard it. Bacterial contamination or oxidation has occurred. Do not use expired Tylan 50. Tylosin degrades over time, and the concentration drops below therapeutic levels. You end up underdosing the bird, which promotes antibiotic resistance.
Wipe the rubber stopper with alcohol before inserting the needle each time. Use a fresh needle for each bird. Reusing needles transfers bacteria between birds and dulls the needle, making injections more painful. A dull needle also increases the risk of breaking off in the muscle. Dispose of used needles in a sharps container, never loose in the trash.
Tylan 50 is relatively safe compared to some antibiotics, but injection-site reactions happen. You may see swelling, bruising, or a firm lump at the injection site. This usually resolves in 3 to 5 days. If the lump is hot, growing, or the bird is limping, you've caused an abscess or hit a nerve. Stop treatment and monitor. Abscesses require drainage and sometimes a different antibiotic.
Questions people still ask
Can chicks have Tylan 50 powder or injectable?
Yes, but dose by weight. A 1-pound chick gets 0.1 to 0.2 mL of Tylan 50 injectable once daily for 3 days. Use a 1 mL syringe with a 25-gauge needle and inject into the breast muscle. For powder, mix 1 gram per gallon of water. Chicks under 2 weeks old are harder to inject safely, so soluble powder is usually the better choice.
Is Tylan 50 still good after it's been opened for a few months?
No. Once opened, Tylan 50 is only good for 28 days if refrigerated. After that, potency drops and contamination risk rises. If the vial has been open longer than 28 days, discard it and open a fresh one. Expired or degraded tylosin will not reach therapeutic levels, and you'll waste time treating an infection that isn't getting better.
How do I administer Tylan injections safely without hitting bone or causing injury?
Locate the breast muscle by feeling for the keel bone, then moving your fingers outward into the thick muscle on either side. Insert the needle at a 45-degree angle, aiming away from the bone. Pull back on the plunger before injecting; if you see blood, reposition. Inject slowly, then withdraw. Rotate sides daily to prevent muscle damage.
Where can I buy Tylan 50 for chickens in Ontario or other provinces?
In Canada, Tylan 50 and other injectable antibiotics require a veterinary prescription. Contact a poultry veterinarian or a rural vet who treats livestock. Some farm supply stores carry it but will ask for a prescription. You cannot legally buy it online without one. Tylan Soluble Powder for drinking water may have different regulations; check with your provincial veterinary authority.
Does tylosin injection work for chickens in India, and what brands are available?
Yes, tylosin injections are used in Indian poultry. Intas manufactures a tylosin injection marketed under the name Tylsin or Tylosin. The concentration and dose are the same as Tylan 50: 50 mg/mL, dosed at 0.5 to 1 mL per 5 pounds body weight. Other brands include Tylovet and Tylocin. Always check the label for concentration, as some formulations are 100 mg/mL or 200 mg/mL and require dose adjustment.
