Medications

There are so many charts out there for drug use in rats, but some of them are confusing to read or do not have the informations you are looking for. So, the idea here was to provide what I think has everything you need when looking for information on medications for your rat. I have used several of the drugs with my own rats, and my dad is a pharmacist, so I would be happy to answer any questions I can. Just drop me an email. If you find that any of the information contained on these medication pages is incorrect or outdated, or if I am missing any that you know of, please let me know as well!

Bactericidal Antibiotics
Bactericidal antibiotics kill the invading bacteria and are an effective choice for severe, acute infections. They only kill the growing bacteria, they do not keep the bacteria from reproducing. Most bactericidals are broad spectrum antibiotics. It should be noted that those in the penicillin family may cause allergic reactions in some rats, so use with caution. Often times, specific combinations of medications are used to help combat infections; however, when combining bactericidals with other types of antibiotics (bacteriostatics), the effectiveness of the antibiotics may actually become impaired. So, choose drug combinations with care and only under the direction of a veterinarian that is experienced in treating and medicating rats.
The chart below shows several of the bactericidal antibiotics that are commonly used in rats. For more information, please use the references found below the chart and contact your veterinarian.
DRUG
BRAND
FAMILY
USES

DOSE

SCRIPT
NOTES
CONTRADICTIONS
Amoxicillin
Amoxi-Drops
Penicillin
Urinary & secondary infections; prevention of infection after injury or surgery
10-50mg/lb BID orally
10-14 days
Yes
Not effective against Mycoplasma. May cause diarrhea. Works well w/ Gentocin.
Do not combine with Atenolol
Amoxicillin Trihydrate
Clavamox, Augmentin
Penicillin
Skin infections & abscesses; bacteria that doesn't respond to Amoxicillin
10mg/lb BID orally
10-14 days
Yes
Not effective against Mycoplasma. May cause diarrhea.
Do not combine with Atenolol
Cefadroxil
Cefa-Drops
Cephalosporin
Urinary, secondary, skin & soft tissue infections; prevention of infection after injury or surgery
10mg/lb BID orally
10-14 days
Yes
None
None
Cefuroxime
Ceftin
Cephalosporin
Urinary, skin, bone & respiratory infections; septicemia and meningitis
10-25mg/lb BID orally
Yes
Strongest of the cephalosporins.
None
Cephalexin
Keflex
Cephalosporin
Urinary, skin, bone & respiratory infections
12-25mg/lb TID orally
Yes
Works well w/ Chloremphenicol palmitate.
Do not combine with Gentamicin
Difloxacin
Dicural
Fluoroquinolone
Mycoplasma, skin, intestinal & urinary infections; prevention of infection after injury or surgery
4.6mg/lb BID orally
Do not use more than 30 days
Yes
May be better absorbed than Enrofloxacin.
None
Enrofloxacin
Baytril
Fluoroquinolone
Mycoplasma, skin, intestinal & urinary infections; prevention of infection after injury or surgery
10mg/lb BID orally
Yes
Works well w/ Doxycycline, penicillins, cephalosporins & Gentocin. Can be used long term.
Do not use in growing rats
Gentamicin
Gentocin
None
Mycoplasma, urinary & serious respiratory infections
10-30mg/lb BID or TID subQ
Yes
Works well w/ Amoxicillin & Baytril. Can cause loss of coordination & decreased cardiac output. Encourage fluids.
Do not combine with Cephalexin
Metronidizole
Flagyl
None
Anaerobic bacteria that infects bone, tooth sockets, etc
10-30mg/lb BID or TID orally
Yes
None
Not for use in rats with neurologic or heart problems
Trimethoprim Sulfamethoxazole
Tribrissan, Septra, Bactrim
None
Urinary, secondary & prostate infections
15mg/lb BID orally
Do not use long term
Yes
Not effective against Mycoplasma. Can cause allergic reactions, vitamin K deficiency, kidney obstruction & decreased tear productivity. Penetrates all tissues.
Use caution with aspirin and NSAIDs, as it enhances their effects
Bacteriostatic Antibiotics
Bacteriostatic antibiotics prevent the invading bacteria from reproducing, allowing the rat's own immune system to effectively take care of the present bacteria. They themselves do not kill the bacteria. They are the choice for more mild or chronic infections. Many bacteriostatics are broad spectrum antibiotics, with the exceptions being Tylosin and Erythromycin. Often times, specific combinations of medications are used to help combat infections; however, when combining bacteriostatics with other types of antibiotics (bactericidals), they may actually impair effectiveness. So, again, choose drug combinations with care and only under the directino of a veterinarian that is experienced in treating and medicating rats.
The chart below shows several of the bacteriostatic antibiotics that are commonly used in rats. For more information, please use the references found below the chart and contact your veterinarian.
DRUG
BRAND
FAMILY
USES

DOSE

SCRIPT
NOTES
CONTRADICTIONS
Azithromycin
Zithromax
Macrolide
Mycoplasma & respiratory infections
5-15mg/lb BID orally
14 days then SID another 14 days
Yes
None
Do not combine with Chloremphenicol palmitate, Digoxin or Clinamycin
Chloramphenicol
Chloramphenicol palmitate
None
Mycoplasma
25-90mg/lb BID to TID orally
Yes
Can depress bone marrow & cardiac output. Do not use long term. Penetrates many tissues, such as the CNS & eyes. Don't use tablets (inhaled powder can cause aplastic anemia in people)
Do not combine with aspirin, NSAIDs, penicillins, or aminoglycosides; do not use in growing rats
Clindamycin
Anti-robe
None
Mycoplasma; anaerobic bacteria that infects bone, tooth sockets & deep tissue

5-10mg/lb BID orally
Do not use more than 30 days

Yes
None
Do not combine with Tylan, Ornacyn or Zithromax; do not use in rats with allergies
Doxycycline
Vibramycin
Tetracycline
Mycoplasma
2.5-5mg/lb BID orally
Yes
Works well w/ Baytril or Zithromax. Does not bind to minerals. Can be used long term. Stronger than tetracycline.
Do not combine with Digoxin or dairy products; do not give to pregnant or nursing does
Erythromycin
Ornacyn
Macrolide
Mycoplasma, Strep, Staph & Corynebacteria; abscesses & general infections
10mg/lb TID orally
No
May cause gastrointestinal upset.
Do not combine with other antibiotics, Digoxin or fruit juice
Tetracycline
Panmycin Aquadrops, Ornacycline, Terramycin
Tetracycline
Mycoplasma, Pasteurella, abscesses & respiratory infections; prevention of infection after injury or surgery
25mg/lb TID orally (Panmycin)
1/8 tablet TID orally (Ornacycline)
1/8 tsp. TID orally (Terramycin)
Yes (Panmycin)
No (Ornacycline, Terramycin)
Encourage fluids.
Do not combine with Digoxin or dairy products; do not give to pregnant or nursing does
Tylosin
Tylan Injectable
Macrolide
Mycoplasma
4.5mg/lb BID orally
No
Encourage fluids.
Do not combine with other antibiotics
Respiratory, Heart Disease & Tumor Medications
This is by no means an exhaustive list, but contains what I've found to be some of the more common medications you may need to use with typical diseases. As with the other charts, please let me know if there are some missing or inaccurate. Any other information you have to share is welcome too!
DRUG
TYPE/BRAND
USES

DOSE

SCRIPT
NOTES/
CONTRADICTIONS
Albuterol
Bronchodilator
Pneumonia, conjestive heart failure & advanced respiratory diseases
0.05mg/lb BID to TID
Yes
Relaxes the lungs to help rats breathe easier
Aminophylline
Bronchodilator
Pneumonia, conjestive heart failure & advanced respiratory diseases
2.5-5mg/lb BID to TID orally or subQ
Yes
Relaxes the lungs to help rats breathe easier; use with caution as it may have a stimulant effect
Atenolol
Beta-blocker
Congestive heart failure
1mg/lb BID orally
Yes
Slows the heartbeat to improve effectiveness; may double dose with disease progression
Chlorpheniramine maleate
Antihistamine / Chlor-Trimaton
Allergy & respiratory problems
0.01-0.2mg/lb BID orally
No
None
Dexamethasone
Anti-inflammatory corticosteriod / Azium
Pneumonia, inner ear infections, pituitary tumors & injury
0.5-1mg/lb SID to BID subQ or orally
Yes
Reduces swelling or inflammation; use only for short periods; depresses immune system
Dexaphosphate
Anti-inflammoatory corticosteriod
Shock & severe swelling
0.23-0.9mg/lb subQ
Yes
Reduces swelling or inflammation; faster acting and shorter lasting than Dexamethasone; depresses the immune system, but less than Dexamethasone
Digoxin
Cardiac glycoside
Dilated cardiomyopathy
0.0025mg/lb BID orally
Yes
Helps the heart beat more strongly; high doses can cause poor appetite; do not combine with tetracyclines or macrolides; may need to increase dose with disease progression
Diphenhydramine hydrochloride
Antihistamine / Benadryl
Allergies & respiratory disease
11mg/lb BID orally
Yes
None
Enalapril
ACE inhibitor
Congestive heart failure
0.25mg/lb BID orally
Yes
Lowers blood pressure; can be used as a diagnostic tool for CHF; may need to double dose with disease progression
Ephedrine
Bronchodilator / Primatene
Pneumonia, conjestive heart failure & advanced respiratory diseases
1mg/lb BID
No
None
Furosemide
Diuretic / Lasix
Congestive heart failure
1-2mg/lb BID orally
Yes
Flushes excess fluid from the lungs; dose may need to be adjusted with disease progression
Lisinopril
ACE inhibitor
Congestive heart failure
2mg/lb BID orally
Yes
Lowers blood pressure
Prednisone
Anti-inflammatory corticosteriod
Pneumonia, inner ear infections, pituitary tumors & injury
0.25-1mg/lb SID orally
Yes
Reduces swelling or inflammation; use only for short periods except in the case of chronic or advanced cases of respiratory disease; depresses immune system; end treatments gradually, reducing to every other day then every third
Tamoxifen
Nonsteriodal antiestrogen / Nolvadex
Malignant mammary & pituitary tumors
3mg/lb SID
Yes
None
Terbutaline
Bronchodilator
Pneumonia, conjestive heart failure & advanced respiratory diseases
0.025-0.05mg/lbTID
Yes
None
Theophylline
Bronchodilator
Pneumonia, conjestive heart failure & advanced respiratory diseases
2-2.5mg/lb BID to TID
Yes
None
Vitamin K
Vitamin Supplement
Promotes blood clotting
0.5-5mg/mg subQ SID
Yes
None
Sedative & Pain Management Medications
Again, this chart may not be complete, but those contained in it seem to be the most commonly used. Please let me know if there are some missing or inaccurate, or if there is one you feel I should add.
DRUG
TYPE/BRAND
USES

DOSE

SCRIPT
NOTES/
CONTRADICTIONS
Acetaminophen
Analgesic / Tylenol
Pain & inflammation
90-140mg/lb every 4-12 hours orally
No
Dosing too high can cause liver damage
Aspirin
NSAID
Pain
45-205mg/lb every 48 hours orally
No
Dosing too high or too often can cause stomach damage; destroys platelets, prolonging bleeding time, so do not use for pain relief after surgery or bleeding injury; interferes with ovulation
Buprenorphine
Analgesic
Pain
0.0045-0.0227mg/lb SQ BID to TID
Yes
None
Butorphanol
Analgesic
Pain
0.25-1mg/lb every 4-6 hours subQ
Yes
None
Clonzapam
Sedative
Sedation for non-painful procedures
0.5mg/lb orally
Yes
None
Codeine
Analgesic
Pain
10mg/lb orally
Yes
None
Diazapam
Sedative / Valium
Sedation for non-painful procedures
2.3mg/lb orally
Yes
None
Flunixin
NSAID
Pain
0.75mg/lb SID to BID orally
Yes
None
Ibuprofen
NSAID / Advil
Pain & inflammation
15-60mg/lb BID to TID orally
No
Can cause fluid retention, decreased blood flow to organs, stomach problems, and decreased clotting; do not use in rats with kidney or heart problems; do not combine with diuretics; more effective for pain than aspirin or Tylenol
Metacam
Analgesic
Pain
0.25mg/lb SID orally
Yes
None
Properidol
Sedative
Sedation for non-painful procedures
0.23mg/lb orally
Yes
None
Parasite & Fungal Treatment Medications
I am including this chart to be as thorough as possible, however, I personally have never used anything but Zimecterin and have had nothing but success with it. Let me know, as always, if there are any changes you see that need to be made.
DRUG
TYPE/BRAND
USES

DOSE

SCRIPT
NOTES/
CONTRADICTIONS
Griseofulvin
Antifungal
Ringworm
12-25mg/lb BID for 4-6 weeks
Yes
None
Ivermectin
Parasiticide / Ivomec, Zimecterin
Lice, mites, pinworms, roundworms
100-200mcg/lb 1x a week for 3 weeks orally (Ivomec)
Dose the size of an uncooked grain of rice 1x a week for 3 weeks orally (Zimecterin)
Yes (Ivomec)
No (Zimecterin)
Enters bloodstream, which becomes toxic to parasites
Ketoconazole
Antifungal / Nizoral
Ringworm & other fungal infections
4mg/lb TID for 3-4 weeks
No
Improvement should be seen in 1-2 weeks
Lufenuron
Parasiticide / Program
Lice, fleas, ringworm
1/3 the dose for a cat (0-10lbs) for a 3/4lb rat
1/2 the dose for a rat more that 3/4lb
1/4 the dose for a rat less than 3/4lb
In all cases, give every 2 weeks for 3 doses
Yes
None
Praziquantel
Parasiticide / Droncit
Tapeworm
5mg/lb subQ once and again in 10 days
Yes
None
Selemectin
Parasiticide / Revolution for Kittens or Cats
Lice, mites, fleas
1 dose of 4-8mg/kg topically
Yes
Refer to directions on the package when using.
Digestive Disorder Medications
As with all the others, this chart may not be complete, but contains some of the most common medications in this category. Let me know if you have changes or additions you would like to see. I would also like to note that trying some whole milk plain yogurt for minor digestive problems is advised before turning to any medication. Even some foods can help firm or loosen stools as necessary.
DRUG
BRAND
USES

DOSE

SCRIPT
NOTES/
CONTRADICTIONS
Bismuth subsalicylate
Kaopectate or Pepto Bismol
Diarrhea
2 drops/15-30g BID orally (Kaopectate)
0.1mL/15-30g BID orally (Pepto Bismol)
No
None. May cause black stools.
Cimetadine
Tagamet
Megaesophagus
3mg/lb BID orally
Yes
Reduces stomach acid
Cisapride
Propulsid
Megacolon
0.2-0.4mg/lb orally
Yes
Success has only been achieved in a small number of adult rats
Loperamide HCl
Imodium AD
Diarrhea
1/10th human dose orally
No
Metoclopramide
Reglan
Megaesophagus
0.15mg/lb BID orally
Yes
Speeds the emptying of the stomach
Senna
Senokot
Megacolon & constipation
1/8 tablet/lb SID orally
No
Natural laxative
REFERENCES
AGAWA Companion Animal Hospital - Dr. Virginia Leis
Bay Valley Animal Hospital - Dr. John VanDaele
Covenant Pharmacy - Robert Paterson
Rat Fan Club - www.ratfanclub.org
Rat Guide - www.ratguide.com
Rat Health Care 10th Edition - Debbie Ducommun
Rat & Mouse Club of America - www.rmca.org
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