@375Fox sorry to say but your above post is just not true!
We have had this discussion before if you recall.
When I worked in Africa, as an overland drive I had at least half a dozen passengers that were not fair skinned that came down with the side effects discussed above. I also had the side effects whenever I took it and I’m by no means fair skinned. Had a client from Tonga that needed to get off of it. By week four he just couldn’t go into the sun. We had him in gloves long pants long sleeves closed shoes by the time we got to vic falls. Took him up to the local surgery there and the Doctor told him to get off the Doxy. He prescribed him something else which I can’t remember now, but I think it may have been Lariam.
Doxycycline is a great drug for a lot of Africas hidden dangers. But it does have side effects that can and do effect not just the fair skinned.
In the two and a half years that I did the job I had with well over 300 passengers and that’s not even counting the other overlanders and there passengers that we often ran parallel with. The shortest trip was 15 days the longest 77 so I got to see what the side effects were on a lot of the main prophylactics that we used at the time. Doxy was the most used (Lariam had gone out of favour due to the side effects it threw up psychedelic dreams. Was not a good one to be on if you are on anti depressants).
Guys ask your doctors before you go don’t just take the advice here. Everybody is different and your reaction to these drugs can and do vary!