My cat got theophylline twice in 6 hours. Is it an overdose?

Most Levothyroxine tablets come in 0.1-0.9mg dosages, so I am not sure why your pet is on a full 5mg dosage. If this is not a typo, then this is a pretty hefty dosage for a cat to receive if she surely got 2.5mg's. However, severe life threatening symptoms from a single overdose are less likely than with chronic overdosing. Some signs you may see are: Vomiting, diarrhea, hyperactivity to lethargy, hypertension, tachycardia, tachypnea, dyspnea, and abnormal pupillary light reflexes. It can take 1-9 hrs for absorption to occur. Then the drug should be mostly out of her system 12-24 hrs. In most cases this is not an emergency situation, but you can see the symptoms I mentioned above, which should be treated with supportive care through your vet. This is a tough one indeed, but it is likely that Kilala will be ok, since I assume that the dosage you gave has to be incorrect based on the typical dosage that dogs receive (between 0.1-0.9mg). I hope that everything works out well for your pet Kilala. Best wishes and take care!

That should not cause any damage or severe toxic effect. I would just monitor him at this stage but I would definitively recommend a veterinary check up if you notice diarrhoea, vomiting, lethargy or inappetence. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

The toxic dose for this drug is quite high, but what you are describing definitely sounds like toxic reaction and requires emergency veterinary care to prevent Luis from getting worse. The veterinarian will likely want to have him on IV fluids and keep him for observation over the next 24 hours, since this is the most critical time. There is really nothing you can do for him at home, so it's best to get him to the vet as soon as possible. Also, I would consider not using piperazine again in any of your pets. This is an outdated drug. Good luck and I hope Luis gets better soon.

This is about a 5-fold overdose for your cat. Please take her to your vet right away. He will have to make your cat regurgitate the capsule. At overdose with 20 mg/kg Clomicalm (5 times the maximum therapeutic dose), bradycardia and arrhythmias (atrioventricular node block and ventricular escape beats) were observed approximately 12 hours after dosing in dogs. Cats are usually more sensitive to medications, so this may be more toxic. Please take your kitty to your vet now.

I would not be overly concerned, although the recommended dose is 5-10mg/lb (and an 8lb cat would have consumed approx 15mg/lb) it does have a wide safety margin and overdose symptoms are very rare. I would expect some mild gastrointestinal upset and a probiotic would be helpful to reduce the impact on the natural gut balance

This is an overdose, and you may see signs such as vomiting, diarrhea, nausea, and anorexia. Studies show no permanent damage to cats given an overdose, so that's good news. If you do see any of those signs I mentioned above, have B seen by a vet to be safe. I hope this helps!

I am not sure which dosage of tablet you are using to make the suspension but cats tolerate well 20mg/kg long term, it is very unlikely that a one time doubled dose will cause any toxic effect to Bella even if it is slightly over this dosage.