Is Lamisil safe for a 4yr old?

My son has a red ring shaped patch on his face and the doctor prescribed lamisil. He said it's a ringworm. I started applying the product 2 days ago. I have some questions and I hope that you can kindly assist me.
Is it safe for his age? Can he still go to swim while treating it? What about school, shall I cover it with a bandage?
Thank you so much in advance for your help. This site is of great help. Thanks.

[Dr Santos]

Hi,

Terbinafine or Lamisil is an antifungal antibiotic.It is used to treat infections caused by fungus that affect the fingernails or toenails. Lamisil oral granules are used to treat a fungal infection of scalp hair follicles in children who are at least 4 years old. It is important to take this medication exactly as prescribed by your doctor. Do not take it in larger amounts or for longer than recommended. Lamisil granules should be sprinkled into a spoonful of pudding or mashed potatoes (do not mix with applesauce, fruit juice, or other acidic foods). The Lamisil granule mixture should be taken with a meal. Take this medication for the full prescribed length of time even if your symptoms may improve before the infection is completely cleared. Do not cover the lesion and initially, refrain from swimming since this can be contagious.

To be sure this medication is not causing harmful effects, blood may need to be tested on a regular basis. Liver function may also need to be tested. It is important to follow-up with your doctor regularly. Follow your doctor's instructions about any restrictions on food, beverages, or activity while you are using Lamisil.

Stop taking Lamisil and call your doctor at once if your child has a serious side effect such as: joint pain or swelling, swollen glands, patchy skin color, or a butterfly-shaped skin rash over your cheeks and nose; fever, chills, body aches, flu symptoms; changes in vision; weight loss due to taste changes; scaly, itchy, and flaky skin rash; or fever, sore throat, and headache with a severe blistering, peeling, and red skin rash.

Take care and keep us posted.

[Ver73]

Thank you so much for your help Doctor Santos. Will keep you posted with his developments.

Best Regards