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Some of the possible side effects with dicloxacillin include diarrhea, nausea, and vomiting. However, because dicloxacillin is an older medication, there is no specific information on how often certain problems may occur. There are also some potentially serious reactions to be aware of, such as fever, seizures, or bloody diarrhea, that require urgent medical treatment.

An Introduction to Side Effects of Dicloxacillin

Just like any medicine, dicloxacillin can cause side effects. However, not everyone who takes the drug will have problems. In fact, most people tolerate it quite well. If side effects do occur, in most cases, they are minor and either require no treatment or are treated easily by you or your healthcare provider.
(This article covers many, but not all, of the possible side effects with dicloxacillin. Your healthcare provider can discuss a more complete list with you.)

Possible Dicloxacillin Side Effects

For most newer medications, the prescribing information provides highly detailed information on potential side effects, carefully describing the exact percentages of people who developed each adverse reaction during clinical studies.
However, the same is not true for older medications; the prescribing information for most older medications includes only vague information about possible side effects, with no exact percentages. Dicloxacillin is an older medication, and detailed information about potential side effects is not available.
Some of the possible bothersome, but not usually dangerous, problems with dicloxacillin may include:
  • Nausea
  • Vomiting
  • Diarrhea
  • Canker sores
  • Black, hairy tongue (which is disturbing, but temporary and not dangerous).
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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