"To give another dose" means to provide or administer an additional amount of something, typically medication or a treatment, to someone or something. Full definition
In one experiment, he was able to manipulate the trust of participants simply by giving them a dose of oxytocin. (entrepreneur.com)
If you miss a dose, give a dose as soon as possible unless it is near the time for their next dose. (diamondbackdrugs.com)
It may help to do a «test run» by giving a dose of the medication a few days before travel so you can observe its effects on your pet. (petbehavior.org)