Acyclovir, while generally safe, can cause mild side effects in some individuals. These might include headache, nausea, and diarrhea. These usually resolve on their own, but stop using the medication and consult a doctor if they persist or worsen.
More serious, though rare, side effects include kidney problems. This risk increases with high doses or pre-existing kidney issues. Always inform your doctor about any existing medical conditions, especially kidney disease, before using acyclovir.
Skin reactions, such as itching or rash, are also possible. If you experience a severe allergic reaction, seek immediate medical attention. This might manifest as difficulty breathing or swelling of the face, lips, or tongue.
Neurological side effects, such as confusion or seizures, are uncommon but potentially serious. People with a history of neurological problems should exercise caution and discuss use with their doctor.
Pregnant or breastfeeding women should speak with their doctor before using over-the-counter acyclovir. The medication might not be suitable in all circumstances.
Follow the recommended dosage instructions precisely. Do not exceed the prescribed amount, and always consult a pharmacist or doctor if you have any questions regarding dosage or usage.