Because I already had some of the liquid from using it topically. It's the same drug in both the tablets and the liquid, it really makes no difference which one you take. The inactive ingredients in most (I can't say all) liquid minoxidil are harmless in the amounts consumed via this method, so why not? Buying tablets would only be an extra expense. Plus I take it sublingual, so liquid is even easier for that. I only do 1 drop because I don't want a large dose. If I can maintain my topical gains with oral minoxidil 1.25mg then I will consider my experiment a success because applying the topical is a pain in the ***. If I get additional gains from the oral route, that's even better I suppose.
Also, I take 2 drops now. I haven't noticed any extra body or facial hair at like 3 months into taking OM so I decided to take 2.5mg to see if I can add any density or get any extra hair on my hairline. No other side effects either- my skin looks fine, no edema, no black circles under my eyes, no heart issues. I do not think I will go higher than 2.5mg because then extra body and facial hair is virtually guaranteed and I don't want that. You can do both if oral and topical if you're really paranoid, but to me a big perk of doing oral minoxidil is not having to do topical. But I have longish hair and don't like the way topical makes it look, so if you don't have that problem, I guess there's no reason not to do both.