Modern HIV treatments are really effective at keeping you well. It is important you take them every day to control the virus (having an undetectable viral load).
People on treatment with an undetectable virus load for 6 months or more, cannot pass their virus to others. This is referred to as U=U
If you realise you are running out of medication and do not have enough until your next appointment, please contact your clinic as soon as possible and allow plenty of time for a prescription to be prepared. Not all clinics are near to a hospital pharmacy so may need to order medication or ask you to travel to another clinic.