Due to protect you well and prevent any incidents as much as possible, the adequate medicines are useful in some cases. You can take an appropriate supply of any prescription medication you use regularly, including medicine for cold, headache, and stomachache, and insect bite, diarrhea and so on.
There are some Chinese medicine and Western medicine offered as following. You can choose some as you like.
Aspirin or paracetamol
Other commonly used tablets
Other medicines that your local people mentioned for you
Cold and flu tablets
Chinese caterpillar fungus
Antifungal cream or powder
Antiseptic, such as povidone-iodine?
Syringes and needles (Ask for your local doctor, it is useful when you need to inject in a country with medical hygiene problems)
Some medicine or something that can prevent the dizzy sickness
Essential balm, something can keep the mosquito away
Some medicine can prevent the sunstroke