In 2016 I stopped minocycline after four weeks because I did not want to continue the oral antibiotic treatment and I was preparing to start prescribed isotretinoin.

The important correction is that the timing between these medicines should be managed with the prescriber, not improvised from an old blog post.

Isotretinoin should not be taken concurrently with tetracycline antibiotics such as minocycline because of the risk of intracranial hypertension.

In my case I left roughly two weeks between them.

That records what I did.

It is not a recommended washout interval for somebody else.

I had also hoped to fit in another blood donation before starting isotretinoin.

Current Australian Lifeblood guidance says people taking long-term / low-dose minocycline for mild acne or rosacea are generally eligible to donate, but medication and donor eligibility should still be declared and checked with Lifeblood.

Isotretinoin is different: blood donation is not permitted during treatment or for at least one month afterwards.

Around eight days after stopping minocycline I noticed my skin becoming spotty again.

That is a firsthand observation about what happened to me, not proof that minocycline universally “only works while you are taking the pills”.

At this point I was hoping isotretinoin would provide longer-term control.

That was still an expectation, not a result.

Sources