### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Dear Doctor Iam 52 years old. I had my first seizure during my sleep 12 years back. The second attack was in my office within two weeks of the 1st attack. I had consulted a leading Neurologist and had suggested to take 3 tablets of 1oo mg eptoin tablets daily. since then. Iam doing so for the last 12 years without fail. During the last 1year i had developed blood pressure. I had consulted the Physician and was advised to take CTDL-6.25/50 tablet once a day before sleep. Iam keeping my weight steady but still sometimes while walking I feel congestion and sometimes knee pain. Doctor I would like to get your suggestions on the following: 1.Is there any side effects f using this drug for a long time? 2. Wat ae svere side effects that can be caused? 3.Methods to prevent the side effects? Doctor Kindly reply to my above questions.

### output:

Short answer: Side effects are vitamin C deficiency.(shown up by swelling of gums)Blurring of vision (sometimes one hour to 3 hours after the dose taken)The medicine is safe. For life... Never stop it. Seizures can come back. If u notice any seizure in the future, please conciser that the blood brain level of the medicine has become less or you're tolerant to the medicine dose. You then have to consider doing a fresh EEG. B ut I suggest u do a EEG now by consulting your doctor who had treated you or a euro physician for once. You must supplement vitamin C and vitamin b12. As tablets in the morning after breakfast, and two hours later you can take your regular medicines. Your diet must also include iron in the form of vegetables like Paley key sag. Cooked well. Or even great leafy vegetables. Also fruit like Chicago has sufficient iron this must be for breakfast because iron and vitamin C and b12 form a good combination at breakfast time to get 75% absorbed by our body.