Doxycycline is used for malaria prophylaxis or treatment. When it is administered for treatment of P falciparum malaria, this drug must be used as part of combination therapy (eg, typically with quinine or quinidine).
If you buy goods and are not charged the Rhode Island Sales Tax by the retailer, such as with online and out-of-state purchases, you are supposed to pay the 7% sales tax (less any foreign sales tax paid) for these items yourself as the Rhode Island Use Tax.
Rhode Island's Sales Tax By The Numbers: Rhode Island has a higher-than-average sales tax, including when compared to states that allow localities to collect sales taxes (Rhode Island does not). Rhode Island has a statewide sales tax rate of 7.00%, which has been in place since 1947. Unlike many other states, Rhode Island doesn't allow municipal governments to collect a local option sales tax. Therefore, sales tax rates will be the same across the entire state.