Terbinafine, the active ingredient in Lamisil, can cause a range of side effects, from common gastrointestinal issues to rarer but more serious reactions [1][2].
What are the most common Lamisil side effects?
The most frequently reported adverse effects associated with terbinafine include digestive problems like diarrhea, upset stomach, and nausea [1][3]. Changes in taste sensation, including a loss of taste, and skin reactions such as rash or itching are also common [2][3]. Headaches and dizziness can occur [1].
Are there serious side effects I should watch for?
More severe side effects, though less common, require immediate medical attention. These include liver problems, which can manifest as persistent nausea, vomiting, loss of appetite, abdominal pain, jaundice (yellowing of the skin or eyes), dark urine, or clay-colored stools [1][3]. Severe skin reactions, such as blistering, peeling, or a widespread rash, are also serious concerns [2]. Allergic reactions, characterized by hives, difficulty breathing, or swelling of the face, lips, tongue, or throat, are medical emergencies [1]. Blood disorders have also been reported [3].
How long do Lamisil side effects typically last?
The duration of side effects can vary. Some, like taste disturbances, may persist for weeks or months even after stopping the medication [2]. Liver-related symptoms and severe skin reactions are more indicative of ongoing issues and require prompt medical intervention [1][3].
What is the difference between Lamisil oral and topical side effects?
Oral terbinafine is associated with a higher risk of systemic side effects, including liver problems, taste changes, and blood disorders, because it circulates throughout the body [1][3]. Topical formulations of terbinafine (creams, gels, sprays) are applied directly to the skin and generally have fewer and milder side effects, primarily localized skin irritation, redness, or burning at the application site [4].
Can Lamisil cause liver damage?
Yes, liver damage is a known, albeit rare, serious side effect of oral terbinafine [1][3]. Patients are advised to report any symptoms suggestive of liver problems to their doctor immediately [1].
What should I do if I experience side effects from Lamisil?
If you experience any side effects, especially serious ones like signs of liver damage, severe skin reactions, or allergic reactions, you should stop taking the medication and contact your healthcare provider right away [1][2][3]. For milder side effects, discuss them with your doctor, as they may offer management strategies or consider alternative treatments [3].
Sources:
[1] https://www.mayoclinic.org/drugs-supplements/terbinafine-oral-capsule-oral-tablet/side-effects/drg-20067553
[2] https://www.nhs.uk/medicines/terbinafine/
[3] https://www.webmd.com/drugs/2/drug-1503/lamisil-oral/details
[4] https://www.nhs.uk/medicines/terbinafine-for-fungal-nail-infections/