In rare cases, initiation of ribavirin therapy has led to deterioration of respiratory function in infants.

Ribavirin is an anti-viral drug indicated for severe RSV (Human respiratory syncytial virus) infection, hepatitis C infection and other viral infections. Ribavirin is a prodrug, which when metabolised resembles purine RNA nucleotides. In this form it interferes with RNA metabolism required for viral replication.

Ribavirin (Virazole) is used to treat respiratory syncytial virus. In combination with interferons, ribavirin has shown some efficacy against hepatitis C

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Drug tests target opioids, cocaine, THC and amphetamines. Such medications as interferons or ribavirin should not show up on a drug test. If concerned about it, it would be best if the subject informs the tester, perhaps displaying the prescription.