Hi, thank you for your question! Botox for underarms can range from 75-100 units per armpit. This may be an accurate total if you are also adding on forehead botox. Botox pricing per unit can also range in pricing so I would suggest reaching out to different providers. If you are looking for something more permanent for the underarms for hyperhydrosis I would suggest MiraDry. MiraDry may be more cost effective for you for that area. MiraDry is the first and only FDA-approved, non-invasive treatment that safely and effectively reduces excess underarm sweat and odor. Patients typically see an 80% sweat reduction, 60% odor reduction, and a 50% hair reduction at 12 months. The treatment is noninvasive and takes about three hours to complete. Most patients see results after one treatment, though a second may be needed to reach the desired effects. The miraDry system targets and destroys sweat and odor glands in your underarms. These glands do not grow back once they are destroyed. miraDry's proprietary miraWave technology is the ideal wavelength for eliminating sweat and odor glands in the underarm. It non-invasively targets the area where the sweat glands reside and safely destroys them while cooling your skin for added comfort.