My dog is lethargic and not eating after starting Theophylline.

Hi, I would say based on your description of Ginger's recent activity, decrease in appetite, and vomiting that yes, she is certainly telling you that she does not feel well at all. There are many reasons medically for this sudden change. The best recommendation I can make for Ginger is to take her to your veterinarian so he/she can perform a good physical exam and determine the cause of these recent problems. The sooner she can be seen the better as it sounds like she is really not feeling well. Best of luck to you and Ginger. Please reach out if you have any further questions.

Thank you for submitting your question regarding Skye. Gabapentin can cause some sedation and potentially appetite changes when first started. Mist of the time the effects wear off in several days. If her appetite does not return to normal soon, then I recommend contacting her veterinarian. I hope this information helps!

Gabapentin is a pain medication that can have various side effects in animal. Weight loss is not a very common side effect, but pain can cause animals to want to eat less. I would talk with your veterinarian and discuss this issue. It is possible that this medication is not fully effective for your dogs pain and so your dog is not wanting to eat. It is also possible that there is something else going on with your dog. Your vet should run bloodwork to ensure that there are no other issues going on with your pet that would cause the loss of appetite.

Gabapentin carries a recommendation to slowly wean off the medication because seizures have been associated with humans stopping the medication suddenly. I have attached a handout on Gabapentin below. https://www.veterinarypartner.com/Content.plx?P=A&S=0&C=0&A=2764 Part of the decision to suddenly stop the Gabapentin or wean if down slowly depends on the dose and how long a dog as been on the medication. It looks like Angus is on a low dose and has only been on it for a short period of time, so you certainly can discuss stopping it with your veterinarian. However, what you are describing may be a sign of pain not a side effect of the Gabapentin, so you may need to actually increase his dose of Gabapentin or change to another pain medication if Angus is still painful. So, I would discuss it with your veterinarian and see what they recommend. Good luck! I hope that was helpful. Thanks for using PetCoach.

It's difficult to say, because the weakness, lack of appetite and drowsiness could be signs of the arthritis not being controlled well. Gabapentin could be causing these signs, but it would be suspicious of some other cause if this suddenly started happening. I also worry about the paracetamol being responsible for this. Paracetamol is not commonly given to dogs for pain, because it can be toxic to the liver and stomach. Considering all of this, it's really best to have your vet evaluate Rocky and advise any necessary medication changes. They will be able to help narrow-down the cause of this and ensure he gets the appropriate treatment. I hope that helps and Rocky gets better soon.

If Arya ate gabapentin, the most likely side effects you would see are sedation and ataxia (difficulty walking). Luckily there have been no serious safety issues reported in cats. You could also see some GI issues like vomiting, diarrhea, and loss of appetite. I hope this helps.

Thanks for using Petco Pet Education Center, formerly Petcoach! While this can be due to the move, I am suspicious that this could also be something else as it has been a bit longer than expected. Loss of appetite and lethargy can be observed with many conditions such as gastroenteritis, dietary indiscretion, kidney disease, pancreatitis, among many other possibilities. I recommend that you have Ginger evaluated by your veterinarian for further assessment and treatment. They would be able to check for these possibilities and others depending on the findings on exam. Treatment would be based on findings. Good luck and have a great day! Hoping for a speedy recovery!