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Doctor insights on: Fever Blister Prescription Medicine

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Have tried prescription Valtrex (valacyclovir) pills and ointment at the first signs. Still have fever blisters twice a month or more . Any preventative options.?

Have tried prescription Valtrex (valacyclovir) pills and ointment at the first signs.  Still have fever blisters twice a month or more .  Any preventative options.?

May need suppression: If you are having outbreaks twice a month despite using Valtrex (valacyclovir) pills and ointment when you first feel an outbreak starting, you probably need to take Valtrex (valacyclovir) or another pill on a daily basis to try and suppress the outbreaks. Patients can take Valtrex (valacyclovir) pills for up to a year every day. After 1 year you can decide with your doctor if you need to continue or if you can stop. Talk to your doctor. ...Read more

Dr. Mark Diamond
2,227 doctors shared insights

Fever (Definition)

Fever is the temporary increase in the body's temperature in response to some disease or illness. A child has a fever when the temperature is at or above one of ...Read more


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When you have a fever blister and have been applying medicine, is the weird colored stuff on it the scab? I feel really dumb for asking that ....

When you have a fever blister and have been applying medicine, is the weird colored stuff on it the scab? I feel really dumb for asking that ....

Just crust: A fever blister will often ooze some clear fluid (serous fluid) that dries and causes "crusting". In general, you could call it a scab and that would be accurate. Keep the crusted area covered with vaseline so it heals faster and isn't as painful. If you let it dry out, then every time you open your mouth, it will crack and split and cause pain. ...Read more

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What prescription medicines or illicit drugs can cause a fever if stopped or withdrawn?

What prescription medicines or illicit drugs can cause a fever if stopped or withdrawn?

None I know of.: I am not aware of any drugs that will cause significant change in temperature if stopped. Some stimulants can raise temperature mildly while under influence. ...Read more

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I've been on amoxiclav for a week to treat strep and have 4 more days of medicine but I've redeveloped a fever (101.2) and throat blisters. Insights?

I've been on amoxiclav for a week to treat strep and have 4 more days of medicine but I've redeveloped a fever (101.2) and throat blisters. Insights?

Throat: Your throat infections may not be strep. It may be a virus. You may also be having s reaction to the antibiotic. Check in with your doctor. All the best. ...Read more

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What can I put on fever blister?

What can I put on fever blister?

Otc recs: A fever blister, assuming this is the correct diagnosis, is often confirmed by a culture showing herpes simplex virus. It tends to recur in the same location with excess stress and too much sun. Oral rx medications started early work best. Otc options include abreva topically and l-lysine which is a natural remedy. There are some reports of tea tree oil working but a lot of people get irritat. ...Read more

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How to get a fever blister healed?

How to get a fever blister healed?

Tincture of time: Lesions run their course over about 5 days or so. Early treatment with antivirals can shorten the course. Some docs use laser therapy which may also shorten the course. ...Read more

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What's best to use on fever blister?

What's best to use on fever blister?

Acyclovir: You can ask your doctor for a prescription cream for Acyclovir to treat the skin lesions, if they erupted less than 48 hours ago, otherwise, they are going to take their course. You may need to treat the next outbreak early to prevent them from spreading. ...Read more

Dr. Philip Miller
1,671 doctors shared insights

Blistering (Definition)

Blistering is a bubble of skin filled with fluid. They can occur to excessive rubbing (as with a new pair of ...Read more