The UK and Australia allow anyone to import a 'personal amount' of pharmaceutical drugs, with a personal amount being specified as up to 3 months worth. We have been advised that UK Customs officers are not interested in stopping shipments of pharmaceutical drugs (that are within the law) for investigation, and they do not add customs charges.
Various websites on the internet sell generic versions of Truvada (PrEP) for a greatly reduced price (around 85% less) compared to official branded Truvada pills (produced and sold by Gilead Sciences Inc.), and they may or may not ask you to upload a prescription depending on which country they are based in.
As generic HIV meds are widely used globally, the approval process for generic manufacturers makes it important to check that the online supplier is selling versions that are approved by either the US FDA or the WHO, you can also check approved medications on http://www.mims.com/ which is the monthly. This includes versions of tenofovir/FTC manufactured by the following companies: Cipla, Hetero, Mylan and Thai GPO. Generic tenofovir/emtricitabine for PrEP currently costs from approximately $50-100 for 30 tablets depending on the online supplier, plus delivery costs.
MIMS, Monthly Index of Medical Specialities, is a pharmaceutical prescribing reference guide published in the UK since 1959 by Haymarket Media Group.
The guide contains information about branded and generic drugs in the UK formulary