Vibramycin (Doxycycline) Dosage for Dogs

Antibiotic (Tetracycline) ⏱ Onset: 1-2 hours ⏳ Duration: 12-24 hours

This dosage information is for educational purposes only. Always consult your veterinarian before giving any medication to your pet. Dosages may vary based on your pet's health conditions, other medications, and individual factors.

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Vibramycin Dosage Chart for Dogs by Weight

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Weight	Low Dose	Standard Dose	Max Dose	Frequency
5 lbs (2.3 kg)	11.5mg	11.5mg	23mg	every 12-24 hours
10 lbs (4.5 kg)	22.5mg	22.5mg	45mg (50mg tablet)	every 12-24 hours
15 lbs (6.8 kg)	34mg	34mg	68mg	every 12-24 hours
20 lbs (9.1 kg)	45.5mg (50mg tablet)	45.5mg (50mg tablet)	91mg (2 × 50mg)	every 12-24 hours
25 lbs (11.3 kg)	56.5mg (50mg tablet)	56.5mg (50mg tablet)	113mg	every 12-24 hours
30 lbs (13.6 kg)	68mg	68mg	136mg	every 12-24 hours
40 lbs (18.1 kg)	90.5mg (2 × 50mg)	90.5mg (2 × 50mg)	181mg	every 12-24 hours
50 lbs (22.7 kg)	113.5mg	113.5mg	227mg	every 12-24 hours
60 lbs (27.2 kg)	136mg	136mg	272mg	every 12-24 hours
70 lbs (31.7 kg)	158.5mg (3 × 50mg)	158.5mg (3 × 50mg)	317mg	every 12-24 hours
80 lbs (36.3 kg)	181.5mg	181.5mg	363mg	every 12-24 hours
90 lbs (40.8 kg)	204mg (4 × 50mg)	204mg (4 × 50mg)	408mg (8 × 50mg)	every 12-24 hours
100 lbs (45.4 kg)	227mg	227mg	454mg (9 × 50mg)	every 12-24 hours
120 lbs (54.4 kg)	272mg	272mg	544mg (11 × 50mg)	every 12-24 hours
150 lbs (68 kg)	340mg (7 × 50mg)	340mg (7 × 50mg)	680mg	every 12-24 hours

What is Vibramycin (Doxycycline) used for in dogs?

tick-borne diseases (Lyme, ehrlichiosis) respiratory infections urinary tract infections leptospirosis

How to give Vibramycin to your dog

Always give doxycycline with food and water to prevent esophageal irritation. Do not give dry — follow with a small amount of water or food to ensure the pill reaches the stomach. Avoid giving with dairy products, antacids, or iron supplements, as these reduce absorption.

Available Forms

tablet, capsule, liquid

Give with Food?

Yes — give with food

Side effects of Vibramycin in dogs

Common side effects

nausea

vomiting

diarrhea

decreased appetite

esophageal irritation

Serious side effects

esophageal ulceration
severe photosensitivity
liver toxicity
tooth discoloration (in puppies)

When to call the vet

Call your vet immediately if your dog shows any of these signs:

Vomiting or difficulty swallowing after dosing
Refusal to eat or drooling (may indicate esophageal irritation)
Diarrhea that is severe or bloody
No improvement after 3-4 days of treatment
Skin rash or unusual sensitivity to sunlight

Frequently Asked Questions

What does doxycycline treat in dogs?

Doxycycline is most commonly used to treat tick-borne diseases like Lyme disease, ehrlichiosis, and anaplasmosis. It is also effective against respiratory infections, urinary tract infections, leptospirosis, and certain wound infections. It works against a broad range of bacteria.

How long does a dog take doxycycline?

Treatment duration depends on the condition. For tick-borne diseases, a typical course is 28-30 days. For respiratory or urinary infections, 7-14 days is common. Always complete the full prescribed course to prevent antibiotic resistance.

Can doxycycline cause vomiting in dogs?

Yes, nausea and vomiting are the most common side effects. Giving doxycycline with food significantly reduces this risk. If your dog vomits after taking doxycycline, try giving it with a larger meal. If vomiting persists, contact your vet.

Can I give my dog doxycycline on an empty stomach?

It is not recommended. Unlike some antibiotics, doxycycline should be given with food to reduce nausea and prevent esophageal irritation. Always follow with water or a small treat to ensure the pill reaches the stomach.