Yes, as long as you use the correct weight.
Yes, you can switch brands with no problems at all. Just make sure you use the exact weight that the manufacture of your vehicle recommends.
Yes, you should continue to take methotrexate unless your doctor advises you to stop.
Yes, it is fine to mix brands.
Methotrexate is usually yellow.
Yes
Methotrexate uses insulin needles.
Yes, methotrexate is gluten free.
Rheumatrex (Methotrexate) or Generic Methotrexate Source: rx2040. com 2,5mg - $0.77 per pill
No. Methotrexate is not a controlled medication.
Yes, headaches are a common side effect of methotrexate.
Either switch brands or clean them with eyedrops