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Terbinafine is a custom pharmacy drug classified as an antifungal. Terbinafine is used to treat yeast and fungal infections. It combats fungus by stopping its growth. Terbinafine is most often used to fight infections of the fingernails, toenails, and scalp, as well as ringworm and jock itch.


Terbinafine comes in various forms for usage depending on a patient's condition. It is often administered as a tablet or as granules, both for oral delivery. Granules are usually taken with food. Tablets can be taken with or without food. The tablets are given once per day and typically taken, on average, for about six weeks for fingernail infections, and twelve weeks for toenail infections. If sprinkling the granules on soft food, swallow your spoonful, do not chew.


Side effects may differ from person to person with the use of any drug or medication. You may experience several, a few, one, or zero side effects while using terbinafine and unfortunately there is no way to know which, if any, side effects you will experience in advance of your course. With this in mind it is important to talk to your doctor at your initial consultation. Ask your doctor to explain all possible side effects, this way you will know what to expect and how to respond if you do experience any. Common side effects seen with terbinafine are:

  • Headache
  • Diarrhea
  • Itching
  • Feeling Sad
  • Feeling Worthless
  • Feeling Restless
  • Mood Swings or Changes
  • Loss of Energy or No Energy
  • Loss of Interest in Daily Activities or Routine
  • Sleep Changes
  • Indigestion

Always seek medical assistance if you feel it is warranted. Always seek medical assistance if any side effects are increasing in intensity and/or lingering.

Severe Side Effects Overview:

Some users may experience severe side effects. If you experience anything that feels severe, see your doctor immediately, or seek prompt medical attention at a healthcare center. Some of the more common severe side effects are listed below.

  • Loss of Skin Color
  • Mouth Sores
  • Chest Pain
  • Unexplained Bleeding
  • Abnormal Bruising
  • Blood in Urine
  • Accelerated Heartbeat
  • Irregular Heartbeat
  • Nausea
  • No Appetite
  • Severe Tiredness
  • Vomiting
  • Pain in Right Upper Part of Stomach
  • Dark Urine
  • Pale Stools
  • Jaundice
  • Severe Skin Rash
  • Signs of Infection such as Fever, Sore Throat, etc.
  • Swelling (face, throat, tongue, lips, or eyes)
  • Difficulty Swallowing
  • Trouble Breathing
  • Hoarseness
  • Swollen Lymph Glands
  • Peeling Skin
  • Blistering or Shedding Skin
  • Hives
  • Itching
  • Red and/or Scaly Rash (may be sensitive to sunlight)


If you are considering the use of terbinafine, talk to your doctor, have a full medical screening, and allow your doctor to make the decision as to whether terbinafine will be safe and effective for you and your condition.

Terbinafine may be contraindicated for the following:

  • Liver Problems
  • Depression
  • Systemic Lupus Erythematosus
  • Abnormal Liver Function Tests
  • Decreased Levels of Neutrophils in Blood
  • Breastfeeding
  • Females Who Are Producing Milk

Talk to your doctor before using any form of terbinafine if any of the aforementioned applies to you.

IMPORTANT NOTE: Terbinafine may be contraindicated or inadvisable for some patients due to many and various issues. Talk to your doctor at your initial consultation and discuss the risks, warnings, and potential contraindications associated with the use of this drug.

  • "It is rare to find health professionals who are so willing to educate the patient on what they need to know."

    Clair C. | West Hollywood, CA