I'm posting this info of the crossing I just took as there is almost no info on the internet about it. Take a taxi from the Reynosa airport to downtown for $25US. Or for 8 pesos... From the Reynosa airport, walk 10 minutes to the main road (see Googlemaps). This is a very busy road with half a dozen lanes on each side. However, 30 seconds east of the airport road is a crossing WITH American-style crosswalk. Press the button, wait until the traffic light turns red and cross on your green!
One oral, one IV: Both are actually the same medicine, but Amoxicillin is the oral form of the medication and Ampicillin is the IV form of the medicine. I have actually also seen a few times oral Ampicillin listed as being available, but usually the oral form that is most stable and palatable is the amoxicillin.
The penicillin family of antibiotics contains over 15 chemically related drugs (e.g. penicillin, ampicillin, amoxicillin, amoxicillin-clavulanate, methicillin) that are given by mouth or injection for the treatment of many bacterial infections. It is one of the most frequently used classes of antibiotics in the world.