Hi there missings.a.!
Thanks for your reply. Maybe I confused you by using the "common" word, Doxytabs, but I meant the well-known malaria prophylactic, DOXYCYCLENE. I quote from the webpage,
http://www.ecotravel.co.za :
Anti-malaria tablets (prophylactic)
There are a number of different types of anti-malaria tablets available. Choosing one depends both upon the particular area being visited, and the traveller's own medical history. Within south Africa's borders, SAA netcare travel clinics recommend either mefloquine (mefliam) or doxycycline as being the most effective anti-malaria tablets. Both of these drugs require a prescription.
Doxycycline is taken in an adult dosage of 100mg per day, starting a day or two before entering a malarious area. Like mefloquine (mefliam) it should be taken for four weeks after return. The drug should be taken after a meal, and washed down with plenty of liquid. It should be avoided in pregnancy and children.
Another webpage stated that it should not be taken by children under the age of 8. The tablets must be prescribed by a doctor.
I used Mefliam twice and was as sick as a dog afterwards - fortunately not during the visit, but in the weeks after.

Both times I felt like being poisoned until I stopped after 3 weeks and the symptoms disappeared. After that I used the new tablet, MELANIL, which works wonderful, but at that time it was around R80 per tablet and my medical aid does not cover it, so - for the last 4 visits I decided to try DOXYCYCLENE and with great success

I use probiflora tablets with the Doxy's as with any other antibiotics.
With it I use repellents, not only at night, but also during daytime. Also burn some citronella candles at night

while sitting outside.
Leana