Gabapentin is available in different strengths, and the 800mg dosage is one of the higher options. Doctors prescribe it when lower doses are not effective or when patients have developed a tolerance to lower strengths.Gabapentin is available in different strengths, and the 800mg dosage is one of the higher options. Doctors prescribe it when lower doses are not effective or when patients have developed a tolerance to lower strengths.Gabapentin is available in different strengths, and the 800mg dosage is one of the higher options. Doctors prescribe it when lower doses are not effective or when patients have developed a tolerance to lower strengths.Gabapentin is available in different strengths, and the 800mg dosage is one of the higher options. Doctors prescribe it when lower doses are not effective or when patients have developed a tolerance to lower strengths.Gabapentin is available in different strengths, and the 800mg dosage is one of the higher options. Doctors prescribe it when lower doses are not effective or when patients have developed a tolerance to lower strengths.Gabapentin is available in different strengths, and the 800mg dosage is one of the higher options. Doctors prescribe it when lower doses are not effective or when patients have developed a tolerance to lower strengths.Gabapentin is available in different strengths, and the 800mg dosage is one of the higher options. Doctors prescribe it when lower doses are not effective or when patients have developed a tolerance to lower strengths.